./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix033.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix033.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:17:10,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:17:10,941 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:17:10,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:17:10,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:17:10,995 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:17:10,996 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:17:10,996 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:17:10,996 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:17:10,999 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:17:11,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:17:11,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:17:11,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:17:11,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:17:11,002 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:17:11,003 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:17:11,003 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:17:11,003 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:17:11,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:17:11,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:17:11,004 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:17:11,004 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:17:11,004 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:17:11,005 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:17:11,005 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:17:11,005 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:17:11,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:17:11,005 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:17:11,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:17:11,006 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:17:11,007 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:17:11,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:17:11,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:17:11,008 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:17:11,008 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:17:11,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:17:11,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:17:11,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:17:11,009 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:17:11,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:17:11,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:17:11,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:17:11,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:17:11,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:17:11,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:17:11,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:17:11,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:17:11,244 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:17:11,245 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:17:11,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-14 12:17:12,325 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:17:12,548 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:17:12,548 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-14 12:17:12,565 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2cb962a2/e161c94cbe1e41aea0a1f9ba60c651ac/FLAG35c8025e0 [2024-06-14 12:17:12,580 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2cb962a2/e161c94cbe1e41aea0a1f9ba60c651ac [2024-06-14 12:17:12,582 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:17:12,583 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:17:12,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix033.opt.yml/witness.yml [2024-06-14 12:17:12,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:17:12,754 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:17:12,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:17:12,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:17:12,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:17:12,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:17:12" (1/2) ... [2024-06-14 12:17:12,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:12, skipping insertion in model container [2024-06-14 12:17:12,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:17:12" (1/2) ... [2024-06-14 12:17:12,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ef45466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:17:12, skipping insertion in model container [2024-06-14 12:17:12,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:17:12" (2/2) ... [2024-06-14 12:17:12,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b70e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:17:12, skipping insertion in model container [2024-06-14 12:17:12,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:17:12" (2/2) ... [2024-06-14 12:17:12,764 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:17:12,844 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:17:12,845 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:17:12,846 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:17:12,846 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:17:12,846 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:17:12,846 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-14 12:17:12,885 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:17:13,202 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:17:13,210 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:17:13,364 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:17:13,393 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:17:13,394 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:17:13 WrapperNode [2024-06-14 12:17:13,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:17:13,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:17:13,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:17:13,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:17:13,400 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,410 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,441 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-14 12:17:13,441 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:17:13,442 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:17:13,442 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:17:13,442 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:17:13,450 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,451 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,453 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,465 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 12:17:13,474 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,474 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,481 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,482 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,484 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,485 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:17:13,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:17:13,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:17:13,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:17:13,489 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 12:17:13" (1/1) ... [2024-06-14 12:17:13,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:17:13,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:17:13,532 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 12:17:13,561 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 12:17:13,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:17:13,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:17:13,581 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:17:13,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:17:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:17:13,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:17:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:17:13,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:17:13,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:17:13,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:17:13,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:17:13,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:17:13,585 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 12:17:13,713 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:17:13,715 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:17:14,038 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:17:14,042 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:17:14,165 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:17:14,166 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:17:14,166 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:17:14 BoogieIcfgContainer [2024-06-14 12:17:14,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:17:14,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:17:14,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:17:14,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:17:14,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:17:12" (1/4) ... [2024-06-14 12:17:14,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca1f28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:17:14, skipping insertion in model container [2024-06-14 12:17:14,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:17:12" (2/4) ... [2024-06-14 12:17:14,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca1f28f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:17:14, skipping insertion in model container [2024-06-14 12:17:14,172 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 12:17:13" (3/4) ... [2024-06-14 12:17:14,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca1f28f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:17:14, skipping insertion in model container [2024-06-14 12:17:14,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:17:14" (4/4) ... [2024-06-14 12:17:14,174 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033.opt.i [2024-06-14 12:17:14,186 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:17:14,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:17:14,186 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:17:14,228 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:17:14,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 45 transitions, 102 flow [2024-06-14 12:17:14,319 INFO L124 PetriNetUnfolderBase]: 0/42 cut-off events. [2024-06-14 12:17:14,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:17:14,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 0/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:17:14,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 45 transitions, 102 flow [2024-06-14 12:17:14,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 36 transitions, 81 flow [2024-06-14 12:17:14,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:17:14,338 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;@4cbf802b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:17:14,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:17:14,348 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:17:14,350 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:17:14,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:17:14,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:14,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:17:14,352 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 12:17:14,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1462142692, now seen corresponding path program 1 times [2024-06-14 12:17:14,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272927506] [2024-06-14 12:17:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272927506] [2024-06-14 12:17:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272927506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:15,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:17:15,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824457398] [2024-06-14 12:17:15,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:15,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:17:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:17:15,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:17:15,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-06-14 12:17:15,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:15,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:15,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-06-14 12:17:15,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:15,833 INFO L124 PetriNetUnfolderBase]: 1359/2190 cut-off events. [2024-06-14 12:17:15,834 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:17:15,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 2190 events. 1359/2190 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11459 event pairs, 941 based on Foata normal form. 1/2096 useless extension candidates. Maximal degree in co-relation 4291. Up to 2029 conditions per place. [2024-06-14 12:17:15,866 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 34 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 12:17:15,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 183 flow [2024-06-14 12:17:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:17:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:17:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-14 12:17:15,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-06-14 12:17:15,890 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 81 flow. Second operand 3 states and 83 transitions. [2024-06-14 12:17:15,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 183 flow [2024-06-14 12:17:15,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:15,894 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 108 flow [2024-06-14 12:17:15,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:17:15,912 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2024-06-14 12:17:15,913 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 108 flow [2024-06-14 12:17:15,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:15,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:15,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:15,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:17:15,913 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 12:17:15,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash -664792325, now seen corresponding path program 1 times [2024-06-14 12:17:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:15,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186372569] [2024-06-14 12:17:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:15,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186372569] [2024-06-14 12:17:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186372569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:16,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:17:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442279057] [2024-06-14 12:17:16,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:16,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:17:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:16,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:17:16,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:17:16,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:17:16,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:16,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:16,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:17:16,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:17,144 INFO L124 PetriNetUnfolderBase]: 1560/2438 cut-off events. [2024-06-14 12:17:17,144 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-14 12:17:17,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 2438 events. 1560/2438 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12543 event pairs, 930 based on Foata normal form. 3/2403 useless extension candidates. Maximal degree in co-relation 5441. Up to 2302 conditions per place. [2024-06-14 12:17:17,155 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-14 12:17:17,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 252 flow [2024-06-14 12:17:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:17:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:17:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-14 12:17:17,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-14 12:17:17,157 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-06-14 12:17:17,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 252 flow [2024-06-14 12:17:17,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:17:17,159 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 144 flow [2024-06-14 12:17:17,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 12:17:17,159 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-06-14 12:17:17,160 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 144 flow [2024-06-14 12:17:17,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:17,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:17,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:17,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:17:17,160 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 12:17:17,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:17,161 INFO L85 PathProgramCache]: Analyzing trace with hash 866275369, now seen corresponding path program 1 times [2024-06-14 12:17:17,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:17,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758967553] [2024-06-14 12:17:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758967553] [2024-06-14 12:17:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758967553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:18,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:17:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868658358] [2024-06-14 12:17:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:17:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:17:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:17:18,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:17:18,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:18,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:18,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:17:18,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:18,394 INFO L124 PetriNetUnfolderBase]: 1568/2498 cut-off events. [2024-06-14 12:17:18,394 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2024-06-14 12:17:18,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 2498 events. 1568/2498 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13164 event pairs, 669 based on Foata normal form. 5/2482 useless extension candidates. Maximal degree in co-relation 6116. Up to 2248 conditions per place. [2024-06-14 12:17:18,410 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-14 12:17:18,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 406 flow [2024-06-14 12:17:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:17:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:17:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-14 12:17:18,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 12:17:18,415 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 144 flow. Second operand 5 states and 135 transitions. [2024-06-14 12:17:18,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 406 flow [2024-06-14 12:17:18,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:17:18,419 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 243 flow [2024-06-14 12:17:18,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-06-14 12:17:18,420 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-06-14 12:17:18,420 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 243 flow [2024-06-14 12:17:18,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:18,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:18,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:18,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:17:18,421 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 12:17:18,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash -732993944, now seen corresponding path program 1 times [2024-06-14 12:17:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242943875] [2024-06-14 12:17:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:18,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:19,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:19,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242943875] [2024-06-14 12:17:19,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242943875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:19,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:19,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:17:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46820981] [2024-06-14 12:17:19,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:17:19,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:17:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:17:19,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:17:19,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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 12:17:19,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:19,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:17:19,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:20,070 INFO L124 PetriNetUnfolderBase]: 1580/2518 cut-off events. [2024-06-14 12:17:20,071 INFO L125 PetriNetUnfolderBase]: For 3183/3186 co-relation queries the response was YES. [2024-06-14 12:17:20,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 2518 events. 1580/2518 cut-off events. For 3183/3186 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13269 event pairs, 481 based on Foata normal form. 12/2509 useless extension candidates. Maximal degree in co-relation 7257. Up to 2216 conditions per place. [2024-06-14 12:17:20,084 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 59 selfloop transitions, 19 changer transitions 0/85 dead transitions. [2024-06-14 12:17:20,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 509 flow [2024-06-14 12:17:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:17:20,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 12:17:20,086 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 243 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:17:20,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 509 flow [2024-06-14 12:17:20,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 501 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:17:20,089 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-14 12:17:20,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-14 12:17:20,090 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-06-14 12:17:20,090 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-14 12:17:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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 12:17:20,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:20,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:20,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:17:20,091 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 12:17:20,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1199250010, now seen corresponding path program 1 times [2024-06-14 12:17:20,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:20,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116054961] [2024-06-14 12:17:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:20,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116054961] [2024-06-14 12:17:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116054961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:20,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:20,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:17:20,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209182633] [2024-06-14 12:17:20,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:20,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:17:20,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:17:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:17:20,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:17:20,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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 12:17:20,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:20,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:17:20,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:21,360 INFO L124 PetriNetUnfolderBase]: 1368/2247 cut-off events. [2024-06-14 12:17:21,361 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-14 12:17:21,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7019 conditions, 2247 events. 1368/2247 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12074 event pairs, 562 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 6996. Up to 2036 conditions per place. [2024-06-14 12:17:21,373 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 50 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-14 12:17:21,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 443 flow [2024-06-14 12:17:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:17:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:17:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-14 12:17:21,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-06-14 12:17:21,374 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 5 states and 111 transitions. [2024-06-14 12:17:21,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 443 flow [2024-06-14 12:17:21,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 393 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:21,378 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 273 flow [2024-06-14 12:17:21,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-14 12:17:21,379 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-06-14 12:17:21,379 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 273 flow [2024-06-14 12:17:21,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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 12:17:21,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:21,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:17:21,380 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 12:17:21,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1447483434, now seen corresponding path program 1 times [2024-06-14 12:17:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334201358] [2024-06-14 12:17:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:22,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:22,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334201358] [2024-06-14 12:17:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334201358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:22,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:22,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255338109] [2024-06-14 12:17:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:22,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:22,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:22,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 12:17:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:22,829 INFO L124 PetriNetUnfolderBase]: 1606/2616 cut-off events. [2024-06-14 12:17:22,830 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-14 12:17:22,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8117 conditions, 2616 events. 1606/2616 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13993 event pairs, 676 based on Foata normal form. 2/2592 useless extension candidates. Maximal degree in co-relation 8092. Up to 2373 conditions per place. [2024-06-14 12:17:22,854 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 55 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-14 12:17:22,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 461 flow [2024-06-14 12:17:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-14 12:17:22,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:17:22,856 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 273 flow. Second operand 6 states and 126 transitions. [2024-06-14 12:17:22,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 461 flow [2024-06-14 12:17:22,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 439 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:22,862 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 305 flow [2024-06-14 12:17:22,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-14 12:17:22,864 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-06-14 12:17:22,865 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 305 flow [2024-06-14 12:17:22,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 12:17:22,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:22,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:22,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:17:22,865 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 12:17:22,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1916593059, now seen corresponding path program 1 times [2024-06-14 12:17:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195326891] [2024-06-14 12:17:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:23,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:23,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195326891] [2024-06-14 12:17:23,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195326891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:23,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:23,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:23,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256117697] [2024-06-14 12:17:23,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:23,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:23,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:23,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:23,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:23,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 12:17:23,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:23,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:23,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:24,311 INFO L124 PetriNetUnfolderBase]: 1746/2778 cut-off events. [2024-06-14 12:17:24,311 INFO L125 PetriNetUnfolderBase]: For 8538/8544 co-relation queries the response was YES. [2024-06-14 12:17:24,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9398 conditions, 2778 events. 1746/2778 cut-off events. For 8538/8544 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14653 event pairs, 726 based on Foata normal form. 8/2770 useless extension candidates. Maximal degree in co-relation 9373. Up to 2505 conditions per place. [2024-06-14 12:17:24,326 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 54 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-14 12:17:24,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 547 flow [2024-06-14 12:17:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 12:17:24,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:17:24,327 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 305 flow. Second operand 6 states and 135 transitions. [2024-06-14 12:17:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 547 flow [2024-06-14 12:17:24,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 517 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:24,332 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 347 flow [2024-06-14 12:17:24,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-14 12:17:24,333 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2024-06-14 12:17:24,333 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 347 flow [2024-06-14 12:17:24,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 12:17:24,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:24,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:24,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:17:24,334 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 12:17:24,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:24,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1427987707, now seen corresponding path program 2 times [2024-06-14 12:17:24,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:24,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026239794] [2024-06-14 12:17:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:24,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:25,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:25,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026239794] [2024-06-14 12:17:25,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026239794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:25,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:25,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532530522] [2024-06-14 12:17:25,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:25,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:25,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:25,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 12:17:25,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:25,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:25,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:25,647 INFO L124 PetriNetUnfolderBase]: 1734/2751 cut-off events. [2024-06-14 12:17:25,648 INFO L125 PetriNetUnfolderBase]: For 10319/10325 co-relation queries the response was YES. [2024-06-14 12:17:25,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9634 conditions, 2751 events. 1734/2751 cut-off events. For 10319/10325 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14473 event pairs, 740 based on Foata normal form. 3/2733 useless extension candidates. Maximal degree in co-relation 9608. Up to 2489 conditions per place. [2024-06-14 12:17:25,664 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 48 selfloop transitions, 20 changer transitions 0/76 dead transitions. [2024-06-14 12:17:25,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 521 flow [2024-06-14 12:17:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 12:17:25,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2024-06-14 12:17:25,667 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 347 flow. Second operand 6 states and 131 transitions. [2024-06-14 12:17:25,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 521 flow [2024-06-14 12:17:25,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 76 transitions, 492 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:25,673 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 366 flow [2024-06-14 12:17:25,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-06-14 12:17:25,673 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2024-06-14 12:17:25,673 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 366 flow [2024-06-14 12:17:25,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 12:17:25,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:25,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:25,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:17:25,674 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 12:17:25,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1922314915, now seen corresponding path program 1 times [2024-06-14 12:17:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:25,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630336598] [2024-06-14 12:17:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:26,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:26,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630336598] [2024-06-14 12:17:26,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630336598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:26,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:26,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:26,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484481190] [2024-06-14 12:17:26,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:26,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:26,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:26,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 366 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:26,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:26,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:26,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:27,184 INFO L124 PetriNetUnfolderBase]: 1590/2611 cut-off events. [2024-06-14 12:17:27,184 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-14 12:17:27,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9114 conditions, 2611 events. 1590/2611 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14033 event pairs, 634 based on Foata normal form. 4/2601 useless extension candidates. Maximal degree in co-relation 9087. Up to 2330 conditions per place. [2024-06-14 12:17:27,196 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 63 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-06-14 12:17:27,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 592 flow [2024-06-14 12:17:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 12:17:27,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-14 12:17:27,198 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 366 flow. Second operand 7 states and 146 transitions. [2024-06-14 12:17:27,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 592 flow [2024-06-14 12:17:27,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 527 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:27,205 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 365 flow [2024-06-14 12:17:27,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=365, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-14 12:17:27,205 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-06-14 12:17:27,205 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 365 flow [2024-06-14 12:17:27,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:27,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:27,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:27,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:17:27,206 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 12:17:27,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash -715155925, now seen corresponding path program 1 times [2024-06-14 12:17:27,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064196509] [2024-06-14 12:17:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:27,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:28,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:28,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064196509] [2024-06-14 12:17:28,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064196509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:28,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568514316] [2024-06-14 12:17:28,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:28,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:28,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:28,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 365 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:28,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:28,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:28,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:28,792 INFO L124 PetriNetUnfolderBase]: 1856/2900 cut-off events. [2024-06-14 12:17:28,792 INFO L125 PetriNetUnfolderBase]: For 14773/14779 co-relation queries the response was YES. [2024-06-14 12:17:28,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10882 conditions, 2900 events. 1856/2900 cut-off events. For 14773/14779 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14909 event pairs, 731 based on Foata normal form. 5/2888 useless extension candidates. Maximal degree in co-relation 10854. Up to 2601 conditions per place. [2024-06-14 12:17:28,809 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 64 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-14 12:17:28,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 697 flow [2024-06-14 12:17:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 12:17:28,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2024-06-14 12:17:28,811 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 365 flow. Second operand 7 states and 151 transitions. [2024-06-14 12:17:28,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 697 flow [2024-06-14 12:17:28,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 657 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:28,818 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 444 flow [2024-06-14 12:17:28,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-14 12:17:28,818 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-06-14 12:17:28,819 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 444 flow [2024-06-14 12:17:28,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:28,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:28,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:28,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:17:28,819 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 12:17:28,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1317707417, now seen corresponding path program 2 times [2024-06-14 12:17:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:28,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093154039] [2024-06-14 12:17:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:29,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:29,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093154039] [2024-06-14 12:17:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093154039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:29,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682712831] [2024-06-14 12:17:29,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:29,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:29,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:29,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:29,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:29,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:30,363 INFO L124 PetriNetUnfolderBase]: 1867/2908 cut-off events. [2024-06-14 12:17:30,363 INFO L125 PetriNetUnfolderBase]: For 18390/18396 co-relation queries the response was YES. [2024-06-14 12:17:30,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11747 conditions, 2908 events. 1867/2908 cut-off events. For 18390/18396 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14909 event pairs, 745 based on Foata normal form. 3/2887 useless extension candidates. Maximal degree in co-relation 11718. Up to 2608 conditions per place. [2024-06-14 12:17:30,380 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 60 selfloop transitions, 34 changer transitions 0/100 dead transitions. [2024-06-14 12:17:30,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 828 flow [2024-06-14 12:17:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 12:17:30,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2024-06-14 12:17:30,382 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 444 flow. Second operand 7 states and 151 transitions. [2024-06-14 12:17:30,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 828 flow [2024-06-14 12:17:30,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 792 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:30,391 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 546 flow [2024-06-14 12:17:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 12:17:30,391 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 28 predicate places. [2024-06-14 12:17:30,391 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 546 flow [2024-06-14 12:17:30,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:30,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:30,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:17:30,392 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 12:17:30,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:30,393 INFO L85 PathProgramCache]: Analyzing trace with hash -538024405, now seen corresponding path program 3 times [2024-06-14 12:17:30,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:30,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301922595] [2024-06-14 12:17:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:30,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:31,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:31,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301922595] [2024-06-14 12:17:31,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301922595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:31,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:31,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360097162] [2024-06-14 12:17:31,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:31,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:31,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:31,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:31,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 546 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:31,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:31,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:31,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:31,921 INFO L124 PetriNetUnfolderBase]: 1862/2901 cut-off events. [2024-06-14 12:17:31,921 INFO L125 PetriNetUnfolderBase]: For 21732/21738 co-relation queries the response was YES. [2024-06-14 12:17:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12217 conditions, 2901 events. 1862/2901 cut-off events. For 21732/21738 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14889 event pairs, 745 based on Foata normal form. 3/2880 useless extension candidates. Maximal degree in co-relation 12186. Up to 2605 conditions per place. [2024-06-14 12:17:31,958 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 59 selfloop transitions, 33 changer transitions 0/98 dead transitions. [2024-06-14 12:17:31,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 826 flow [2024-06-14 12:17:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 12:17:31,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2024-06-14 12:17:31,960 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 546 flow. Second operand 7 states and 149 transitions. [2024-06-14 12:17:31,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 826 flow [2024-06-14 12:17:31,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 764 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:31,971 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 558 flow [2024-06-14 12:17:31,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-14 12:17:31,972 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2024-06-14 12:17:31,972 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 558 flow [2024-06-14 12:17:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:31,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:31,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:31,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:17:31,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:31,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:31,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1407223686, now seen corresponding path program 1 times [2024-06-14 12:17:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009539404] [2024-06-14 12:17:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:32,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009539404] [2024-06-14 12:17:32,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009539404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:32,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:32,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:17:32,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126956610] [2024-06-14 12:17:32,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:32,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:17:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:17:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:17:32,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:17:32,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:32,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:32,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:17:32,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:33,260 INFO L124 PetriNetUnfolderBase]: 1534/2566 cut-off events. [2024-06-14 12:17:33,261 INFO L125 PetriNetUnfolderBase]: For 20486/20486 co-relation queries the response was YES. [2024-06-14 12:17:33,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10648 conditions, 2566 events. 1534/2566 cut-off events. For 20486/20486 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14034 event pairs, 581 based on Foata normal form. 1/2551 useless extension candidates. Maximal degree in co-relation 10615. Up to 2252 conditions per place. [2024-06-14 12:17:33,273 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 66 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-06-14 12:17:33,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 760 flow [2024-06-14 12:17:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 12:17:33,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-14 12:17:33,275 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 558 flow. Second operand 6 states and 121 transitions. [2024-06-14 12:17:33,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 760 flow [2024-06-14 12:17:33,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 679 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:33,284 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 546 flow [2024-06-14 12:17:33,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-14 12:17:33,285 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2024-06-14 12:17:33,285 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 546 flow [2024-06-14 12:17:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:33,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:33,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:33,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:17:33,286 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:33,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash 176936383, now seen corresponding path program 1 times [2024-06-14 12:17:33,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:33,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174525778] [2024-06-14 12:17:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:33,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:34,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:34,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174525778] [2024-06-14 12:17:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174525778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:34,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:34,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699904598] [2024-06-14 12:17:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:34,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:34,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:34,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 546 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:34,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:34,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:34,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:34,833 INFO L124 PetriNetUnfolderBase]: 1886/2949 cut-off events. [2024-06-14 12:17:34,834 INFO L125 PetriNetUnfolderBase]: For 27374/27377 co-relation queries the response was YES. [2024-06-14 12:17:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12992 conditions, 2949 events. 1886/2949 cut-off events. For 27374/27377 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15202 event pairs, 730 based on Foata normal form. 2/2947 useless extension candidates. Maximal degree in co-relation 12957. Up to 2630 conditions per place. [2024-06-14 12:17:34,846 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 70 selfloop transitions, 37 changer transitions 0/113 dead transitions. [2024-06-14 12:17:34,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 992 flow [2024-06-14 12:17:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 12:17:34,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-06-14 12:17:34,847 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 546 flow. Second operand 7 states and 152 transitions. [2024-06-14 12:17:34,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 992 flow [2024-06-14 12:17:34,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 962 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:34,861 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 667 flow [2024-06-14 12:17:34,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-14 12:17:34,861 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-06-14 12:17:34,861 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 667 flow [2024-06-14 12:17:34,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:34,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:34,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:34,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:17:34,862 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 12:17:34,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash -694995774, now seen corresponding path program 1 times [2024-06-14 12:17:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:34,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828427876] [2024-06-14 12:17:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:34,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828427876] [2024-06-14 12:17:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828427876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:35,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:35,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41997573] [2024-06-14 12:17:35,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:35,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:35,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 667 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:35,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:35,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:35,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:36,561 INFO L124 PetriNetUnfolderBase]: 1930/3019 cut-off events. [2024-06-14 12:17:36,561 INFO L125 PetriNetUnfolderBase]: For 31761/31764 co-relation queries the response was YES. [2024-06-14 12:17:36,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13653 conditions, 3019 events. 1930/3019 cut-off events. For 31761/31764 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15598 event pairs, 640 based on Foata normal form. 8/3023 useless extension candidates. Maximal degree in co-relation 13617. Up to 2539 conditions per place. [2024-06-14 12:17:36,579 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 79 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-14 12:17:36,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1105 flow [2024-06-14 12:17:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 12:17:36,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-14 12:17:36,581 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 667 flow. Second operand 8 states and 175 transitions. [2024-06-14 12:17:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1105 flow [2024-06-14 12:17:36,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1047 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:36,600 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 768 flow [2024-06-14 12:17:36,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=768, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-14 12:17:36,601 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 42 predicate places. [2024-06-14 12:17:36,601 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 768 flow [2024-06-14 12:17:36,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:36,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:36,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:36,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:17:36,602 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 12:17:36,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash -695001571, now seen corresponding path program 2 times [2024-06-14 12:17:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:36,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070244138] [2024-06-14 12:17:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:37,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:37,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070244138] [2024-06-14 12:17:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070244138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:37,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:37,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285389066] [2024-06-14 12:17:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:37,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:37,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:37,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 768 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:37,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:37,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:37,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:38,163 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-14 12:17:38,163 INFO L125 PetriNetUnfolderBase]: For 36098/36101 co-relation queries the response was YES. [2024-06-14 12:17:38,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14422 conditions, 3017 events. 1925/3017 cut-off events. For 36098/36101 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15601 event pairs, 691 based on Foata normal form. 2/3015 useless extension candidates. Maximal degree in co-relation 14385. Up to 2689 conditions per place. [2024-06-14 12:17:38,180 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 75 selfloop transitions, 40 changer transitions 0/121 dead transitions. [2024-06-14 12:17:38,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 1126 flow [2024-06-14 12:17:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 12:17:38,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 12:17:38,184 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 768 flow. Second operand 7 states and 154 transitions. [2024-06-14 12:17:38,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 1126 flow [2024-06-14 12:17:38,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 121 transitions, 1064 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:38,226 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 794 flow [2024-06-14 12:17:38,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-06-14 12:17:38,227 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2024-06-14 12:17:38,227 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 794 flow [2024-06-14 12:17:38,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:38,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:38,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:38,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:17:38,228 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 12:17:38,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2100744454, now seen corresponding path program 2 times [2024-06-14 12:17:38,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:38,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089474733] [2024-06-14 12:17:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:38,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:39,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:39,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089474733] [2024-06-14 12:17:39,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089474733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:39,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:39,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:39,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457634835] [2024-06-14 12:17:39,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:39,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:39,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:39,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 794 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:39,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:39,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:39,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:40,302 INFO L124 PetriNetUnfolderBase]: 1979/3084 cut-off events. [2024-06-14 12:17:40,302 INFO L125 PetriNetUnfolderBase]: For 41853/41859 co-relation queries the response was YES. [2024-06-14 12:17:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15131 conditions, 3084 events. 1979/3084 cut-off events. For 41853/41859 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15832 event pairs, 660 based on Foata normal form. 5/3076 useless extension candidates. Maximal degree in co-relation 15092. Up to 2558 conditions per place. [2024-06-14 12:17:40,321 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 78 selfloop transitions, 53 changer transitions 0/137 dead transitions. [2024-06-14 12:17:40,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 1424 flow [2024-06-14 12:17:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 12:17:40,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-14 12:17:40,323 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 794 flow. Second operand 8 states and 178 transitions. [2024-06-14 12:17:40,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 1424 flow [2024-06-14 12:17:40,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 1304 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:40,348 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 892 flow [2024-06-14 12:17:40,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=892, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-14 12:17:40,349 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 46 predicate places. [2024-06-14 12:17:40,349 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 892 flow [2024-06-14 12:17:40,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:40,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:40,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:40,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:17:40,350 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:40,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1199561089, now seen corresponding path program 3 times [2024-06-14 12:17:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:40,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816422214] [2024-06-14 12:17:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:40,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:41,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816422214] [2024-06-14 12:17:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816422214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:41,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:41,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:41,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207709532] [2024-06-14 12:17:41,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:41,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:41,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:41,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:41,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:41,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:41,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:41,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:41,958 INFO L124 PetriNetUnfolderBase]: 1974/3088 cut-off events. [2024-06-14 12:17:41,959 INFO L125 PetriNetUnfolderBase]: For 45983/45992 co-relation queries the response was YES. [2024-06-14 12:17:41,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15576 conditions, 3088 events. 1974/3088 cut-off events. For 45983/45992 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15935 event pairs, 717 based on Foata normal form. 5/3084 useless extension candidates. Maximal degree in co-relation 15537. Up to 2762 conditions per place. [2024-06-14 12:17:41,974 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 83 selfloop transitions, 34 changer transitions 0/123 dead transitions. [2024-06-14 12:17:41,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 123 transitions, 1176 flow [2024-06-14 12:17:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:17:41,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-14 12:17:41,976 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 892 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:17:41,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 123 transitions, 1176 flow [2024-06-14 12:17:41,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 123 transitions, 1120 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 12:17:41,998 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 912 flow [2024-06-14 12:17:41,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2024-06-14 12:17:41,999 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-06-14 12:17:41,999 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 912 flow [2024-06-14 12:17:41,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:42,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:42,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:42,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:17:42,000 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 12:17:42,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1453313232, now seen corresponding path program 3 times [2024-06-14 12:17:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:42,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637912039] [2024-06-14 12:17:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:42,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:42,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637912039] [2024-06-14 12:17:42,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637912039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:42,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:42,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823757261] [2024-06-14 12:17:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:42,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:42,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 912 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:42,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:42,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:42,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:43,823 INFO L124 PetriNetUnfolderBase]: 1964/3060 cut-off events. [2024-06-14 12:17:43,823 INFO L125 PetriNetUnfolderBase]: For 49340/49346 co-relation queries the response was YES. [2024-06-14 12:17:43,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15584 conditions, 3060 events. 1964/3060 cut-off events. For 49340/49346 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15720 event pairs, 658 based on Foata normal form. 5/3050 useless extension candidates. Maximal degree in co-relation 15542. Up to 2551 conditions per place. [2024-06-14 12:17:43,840 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 73 selfloop transitions, 55 changer transitions 0/134 dead transitions. [2024-06-14 12:17:43,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1382 flow [2024-06-14 12:17:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 12:17:43,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-14 12:17:43,843 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 912 flow. Second operand 8 states and 175 transitions. [2024-06-14 12:17:43,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1382 flow [2024-06-14 12:17:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1262 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:43,869 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 910 flow [2024-06-14 12:17:43,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-14 12:17:43,870 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2024-06-14 12:17:43,870 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 910 flow [2024-06-14 12:17:43,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:43,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:43,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:43,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:17:43,871 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 12:17:43,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash 501114050, now seen corresponding path program 4 times [2024-06-14 12:17:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:43,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118920916] [2024-06-14 12:17:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:44,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118920916] [2024-06-14 12:17:44,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118920916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:44,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:44,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:44,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703259082] [2024-06-14 12:17:44,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:44,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:44,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:44,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:44,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:44,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:44,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:44,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:45,575 INFO L124 PetriNetUnfolderBase]: 1954/3048 cut-off events. [2024-06-14 12:17:45,576 INFO L125 PetriNetUnfolderBase]: For 53247/53253 co-relation queries the response was YES. [2024-06-14 12:17:45,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15758 conditions, 3048 events. 1954/3048 cut-off events. For 53247/53253 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15670 event pairs, 656 based on Foata normal form. 5/3036 useless extension candidates. Maximal degree in co-relation 15715. Up to 2547 conditions per place. [2024-06-14 12:17:45,595 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 75 selfloop transitions, 52 changer transitions 0/133 dead transitions. [2024-06-14 12:17:45,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1310 flow [2024-06-14 12:17:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 12:17:45,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-14 12:17:45,596 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 910 flow. Second operand 8 states and 174 transitions. [2024-06-14 12:17:45,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1310 flow [2024-06-14 12:17:45,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 1166 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:45,633 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 878 flow [2024-06-14 12:17:45,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-14 12:17:45,634 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 53 predicate places. [2024-06-14 12:17:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 878 flow [2024-06-14 12:17:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:45,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:45,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:45,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:17:45,634 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:45,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash -674260148, now seen corresponding path program 1 times [2024-06-14 12:17:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:45,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327905755] [2024-06-14 12:17:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:46,528 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 12:17:46,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:46,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327905755] [2024-06-14 12:17:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327905755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:46,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:46,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:46,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736930740] [2024-06-14 12:17:46,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:46,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:46,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:46,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:46,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:46,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:46,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:46,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:47,000 INFO L124 PetriNetUnfolderBase]: 1845/2973 cut-off events. [2024-06-14 12:17:47,000 INFO L125 PetriNetUnfolderBase]: For 56982/56982 co-relation queries the response was YES. [2024-06-14 12:17:47,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15402 conditions, 2973 events. 1845/2973 cut-off events. For 56982/56982 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15876 event pairs, 649 based on Foata normal form. 1/2971 useless extension candidates. Maximal degree in co-relation 15359. Up to 2703 conditions per place. [2024-06-14 12:17:47,018 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 89 selfloop transitions, 12 changer transitions 0/115 dead transitions. [2024-06-14 12:17:47,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 115 transitions, 1126 flow [2024-06-14 12:17:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:17:47,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44074074074074077 [2024-06-14 12:17:47,020 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 878 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:17:47,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 115 transitions, 1126 flow [2024-06-14 12:17:47,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 115 transitions, 983 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:17:47,049 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 797 flow [2024-06-14 12:17:47,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=797, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-14 12:17:47,050 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-06-14 12:17:47,050 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 797 flow [2024-06-14 12:17:47,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:47,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:47,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:17:47,051 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:47,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash 46830706, now seen corresponding path program 1 times [2024-06-14 12:17:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527425198] [2024-06-14 12:17:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:47,882 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 12:17:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:47,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527425198] [2024-06-14 12:17:47,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527425198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:47,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:47,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726215282] [2024-06-14 12:17:47,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:47,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:47,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:47,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:47,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 797 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:47,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:47,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:47,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:48,532 INFO L124 PetriNetUnfolderBase]: 1934/3072 cut-off events. [2024-06-14 12:17:48,533 INFO L125 PetriNetUnfolderBase]: For 71312/71315 co-relation queries the response was YES. [2024-06-14 12:17:48,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16860 conditions, 3072 events. 1934/3072 cut-off events. For 71312/71315 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16377 event pairs, 486 based on Foata normal form. 6/3074 useless extension candidates. Maximal degree in co-relation 16816. Up to 2634 conditions per place. [2024-06-14 12:17:48,552 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 97 selfloop transitions, 24 changer transitions 0/136 dead transitions. [2024-06-14 12:17:48,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 136 transitions, 1231 flow [2024-06-14 12:17:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 12:17:48,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 12:17:48,554 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 797 flow. Second operand 7 states and 154 transitions. [2024-06-14 12:17:48,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 136 transitions, 1231 flow [2024-06-14 12:17:48,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1191 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:48,583 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 864 flow [2024-06-14 12:17:48,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=864, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-14 12:17:48,584 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2024-06-14 12:17:48,584 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 864 flow [2024-06-14 12:17:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:48,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:48,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:48,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:17:48,585 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 12:17:48,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash -188303440, now seen corresponding path program 2 times [2024-06-14 12:17:48,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:48,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440305806] [2024-06-14 12:17:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:48,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:49,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:49,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440305806] [2024-06-14 12:17:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440305806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:49,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139254891] [2024-06-14 12:17:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:49,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:49,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:49,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 864 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:49,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:49,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:49,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:49,995 INFO L124 PetriNetUnfolderBase]: 1926/3060 cut-off events. [2024-06-14 12:17:49,995 INFO L125 PetriNetUnfolderBase]: For 77126/77129 co-relation queries the response was YES. [2024-06-14 12:17:50,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17247 conditions, 3060 events. 1926/3060 cut-off events. For 77126/77129 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16295 event pairs, 645 based on Foata normal form. 6/3062 useless extension candidates. Maximal degree in co-relation 17202. Up to 2699 conditions per place. [2024-06-14 12:17:50,015 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 96 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-14 12:17:50,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1158 flow [2024-06-14 12:17:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 12:17:50,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-06-14 12:17:50,016 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 864 flow. Second operand 7 states and 152 transitions. [2024-06-14 12:17:50,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1158 flow [2024-06-14 12:17:50,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1101 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:50,055 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 858 flow [2024-06-14 12:17:50,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=858, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-14 12:17:50,056 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 58 predicate places. [2024-06-14 12:17:50,056 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 858 flow [2024-06-14 12:17:50,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:50,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:50,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:17:50,057 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 12:17:50,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash -70031310, now seen corresponding path program 1 times [2024-06-14 12:17:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688231233] [2024-06-14 12:17:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:50,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:50,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688231233] [2024-06-14 12:17:50,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688231233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:50,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:50,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:50,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926546934] [2024-06-14 12:17:50,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:50,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:50,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:50,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:50,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:51,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:51,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 858 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:51,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:51,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:51,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:51,860 INFO L124 PetriNetUnfolderBase]: 2085/3257 cut-off events. [2024-06-14 12:17:51,861 INFO L125 PetriNetUnfolderBase]: For 85300/85303 co-relation queries the response was YES. [2024-06-14 12:17:51,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18468 conditions, 3257 events. 2085/3257 cut-off events. For 85300/85303 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17008 event pairs, 635 based on Foata normal form. 4/3257 useless extension candidates. Maximal degree in co-relation 18421. Up to 2676 conditions per place. [2024-06-14 12:17:51,883 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 88 selfloop transitions, 55 changer transitions 0/150 dead transitions. [2024-06-14 12:17:51,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1478 flow [2024-06-14 12:17:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 12:17:51,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-14 12:17:51,884 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 858 flow. Second operand 8 states and 177 transitions. [2024-06-14 12:17:51,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1478 flow [2024-06-14 12:17:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:51,925 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 1001 flow [2024-06-14 12:17:51,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1001, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2024-06-14 12:17:51,926 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 60 predicate places. [2024-06-14 12:17:51,926 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 1001 flow [2024-06-14 12:17:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:51,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:51,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:51,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:17:51,927 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 12:17:51,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2136686050, now seen corresponding path program 2 times [2024-06-14 12:17:51,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:51,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097018249] [2024-06-14 12:17:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:52,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:52,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097018249] [2024-06-14 12:17:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097018249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:52,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:52,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658729211] [2024-06-14 12:17:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:52,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:52,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:52,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 1001 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:52,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:52,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:52,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:53,747 INFO L124 PetriNetUnfolderBase]: 2107/3294 cut-off events. [2024-06-14 12:17:53,748 INFO L125 PetriNetUnfolderBase]: For 92837/92840 co-relation queries the response was YES. [2024-06-14 12:17:53,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19126 conditions, 3294 events. 2107/3294 cut-off events. For 92837/92840 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17279 event pairs, 635 based on Foata normal form. 4/3294 useless extension candidates. Maximal degree in co-relation 19078. Up to 2695 conditions per place. [2024-06-14 12:17:53,773 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 90 selfloop transitions, 57 changer transitions 0/154 dead transitions. [2024-06-14 12:17:53,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1607 flow [2024-06-14 12:17:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 12:17:53,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-14 12:17:53,775 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 1001 flow. Second operand 8 states and 179 transitions. [2024-06-14 12:17:53,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1607 flow [2024-06-14 12:17:53,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 154 transitions, 1501 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:53,823 INFO L231 Difference]: Finished difference. Result has 110 places, 120 transitions, 1061 flow [2024-06-14 12:17:53,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1061, PETRI_PLACES=110, PETRI_TRANSITIONS=120} [2024-06-14 12:17:53,823 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2024-06-14 12:17:53,823 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 120 transitions, 1061 flow [2024-06-14 12:17:53,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:53,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:53,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:53,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:17:53,824 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:53,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash -70210800, now seen corresponding path program 3 times [2024-06-14 12:17:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316297279] [2024-06-14 12:17:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:53,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:54,680 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 12:17:54,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:54,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316297279] [2024-06-14 12:17:54,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316297279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:54,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:54,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284111287] [2024-06-14 12:17:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:54,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:54,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:54,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 1061 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:54,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:54,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:54,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:55,501 INFO L124 PetriNetUnfolderBase]: 2097/3280 cut-off events. [2024-06-14 12:17:55,501 INFO L125 PetriNetUnfolderBase]: For 98846/98849 co-relation queries the response was YES. [2024-06-14 12:17:55,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19211 conditions, 3280 events. 2097/3280 cut-off events. For 98846/98849 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17226 event pairs, 626 based on Foata normal form. 4/3280 useless extension candidates. Maximal degree in co-relation 19162. Up to 2687 conditions per place. [2024-06-14 12:17:55,523 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 85 selfloop transitions, 62 changer transitions 0/154 dead transitions. [2024-06-14 12:17:55,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 154 transitions, 1539 flow [2024-06-14 12:17:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 12:17:55,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-14 12:17:55,525 INFO L175 Difference]: Start difference. First operand has 110 places, 120 transitions, 1061 flow. Second operand 8 states and 179 transitions. [2024-06-14 12:17:55,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 154 transitions, 1539 flow [2024-06-14 12:17:55,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 154 transitions, 1425 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:55,574 INFO L231 Difference]: Finished difference. Result has 113 places, 120 transitions, 1079 flow [2024-06-14 12:17:55,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=113, PETRI_TRANSITIONS=120} [2024-06-14 12:17:55,574 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2024-06-14 12:17:55,574 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 120 transitions, 1079 flow [2024-06-14 12:17:55,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:55,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:55,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:55,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:17:55,575 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 12:17:55,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:55,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1125436419, now seen corresponding path program 1 times [2024-06-14 12:17:55,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:55,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975979855] [2024-06-14 12:17:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:55,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:56,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:56,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975979855] [2024-06-14 12:17:56,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975979855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:56,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:56,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:17:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083917794] [2024-06-14 12:17:56,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:56,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:17:56,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:56,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:17:56,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:17:56,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:17:56,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:56,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:56,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:17:56,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:56,946 INFO L124 PetriNetUnfolderBase]: 2018/3198 cut-off events. [2024-06-14 12:17:56,946 INFO L125 PetriNetUnfolderBase]: For 104632/104632 co-relation queries the response was YES. [2024-06-14 12:17:56,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19209 conditions, 3198 events. 2018/3198 cut-off events. For 104632/104632 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17080 event pairs, 650 based on Foata normal form. 1/3196 useless extension candidates. Maximal degree in co-relation 19159. Up to 2897 conditions per place. [2024-06-14 12:17:56,969 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 110 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-06-14 12:17:56,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 137 transitions, 1389 flow [2024-06-14 12:17:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:17:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:17:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-14 12:17:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:17:56,970 INFO L175 Difference]: Start difference. First operand has 113 places, 120 transitions, 1079 flow. Second operand 6 states and 125 transitions. [2024-06-14 12:17:56,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 137 transitions, 1389 flow [2024-06-14 12:17:57,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 137 transitions, 1184 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 12:17:57,017 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 938 flow [2024-06-14 12:17:57,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=938, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-14 12:17:57,018 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2024-06-14 12:17:57,018 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 938 flow [2024-06-14 12:17:57,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:57,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:57,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:17:57,019 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:57,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1986379492, now seen corresponding path program 4 times [2024-06-14 12:17:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:57,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546905836] [2024-06-14 12:17:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:57,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:57,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546905836] [2024-06-14 12:17:57,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546905836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:57,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:57,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:57,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290238103] [2024-06-14 12:17:57,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:57,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:57,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 938 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:57,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:57,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:57,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:58,801 INFO L124 PetriNetUnfolderBase]: 2182/3406 cut-off events. [2024-06-14 12:17:58,801 INFO L125 PetriNetUnfolderBase]: For 113203/113212 co-relation queries the response was YES. [2024-06-14 12:17:58,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20406 conditions, 3406 events. 2182/3406 cut-off events. For 113203/113212 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17926 event pairs, 650 based on Foata normal form. 7/3404 useless extension candidates. Maximal degree in co-relation 20356. Up to 2766 conditions per place. [2024-06-14 12:17:58,822 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 94 selfloop transitions, 59 changer transitions 0/160 dead transitions. [2024-06-14 12:17:58,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 160 transitions, 1600 flow [2024-06-14 12:17:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 12:17:58,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-14 12:17:58,824 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 938 flow. Second operand 8 states and 174 transitions. [2024-06-14 12:17:58,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 160 transitions, 1600 flow [2024-06-14 12:17:58,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1558 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:58,858 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1098 flow [2024-06-14 12:17:58,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2024-06-14 12:17:58,859 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 68 predicate places. [2024-06-14 12:17:58,859 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1098 flow [2024-06-14 12:17:58,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:58,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:58,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:58,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:17:58,860 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 12:17:58,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash 698563328, now seen corresponding path program 5 times [2024-06-14 12:17:58,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:58,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423250397] [2024-06-14 12:17:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:58,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:59,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:59,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423250397] [2024-06-14 12:17:59,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423250397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:59,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:59,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:59,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743302623] [2024-06-14 12:17:59,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:59,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:59,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:59,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:17:59,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:59,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:59,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:17:59,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:00,449 INFO L124 PetriNetUnfolderBase]: 2172/3392 cut-off events. [2024-06-14 12:18:00,449 INFO L125 PetriNetUnfolderBase]: For 120246/120255 co-relation queries the response was YES. [2024-06-14 12:18:00,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20795 conditions, 3392 events. 2172/3392 cut-off events. For 120246/120255 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17866 event pairs, 648 based on Foata normal form. 7/3390 useless extension candidates. Maximal degree in co-relation 20744. Up to 2758 conditions per place. [2024-06-14 12:18:00,472 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 91 selfloop transitions, 60 changer transitions 0/158 dead transitions. [2024-06-14 12:18:00,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 158 transitions, 1578 flow [2024-06-14 12:18:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 12:18:00,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-14 12:18:00,474 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1098 flow. Second operand 8 states and 171 transitions. [2024-06-14 12:18:00,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 158 transitions, 1578 flow [2024-06-14 12:18:00,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1410 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:00,517 INFO L231 Difference]: Finished difference. Result has 117 places, 129 transitions, 1058 flow [2024-06-14 12:18:00,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1058, PETRI_PLACES=117, PETRI_TRANSITIONS=129} [2024-06-14 12:18:00,518 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2024-06-14 12:18:00,518 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 129 transitions, 1058 flow [2024-06-14 12:18:00,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:00,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:00,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:00,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:18:00,518 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 12:18:00,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:00,519 INFO L85 PathProgramCache]: Analyzing trace with hash 706844048, now seen corresponding path program 6 times [2024-06-14 12:18:00,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:00,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318151081] [2024-06-14 12:18:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:00,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318151081] [2024-06-14 12:18:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318151081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:01,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:01,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434868372] [2024-06-14 12:18:01,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:01,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:01,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 129 transitions, 1058 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:01,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:01,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:01,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:02,231 INFO L124 PetriNetUnfolderBase]: 2162/3378 cut-off events. [2024-06-14 12:18:02,231 INFO L125 PetriNetUnfolderBase]: For 125817/125826 co-relation queries the response was YES. [2024-06-14 12:18:02,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20805 conditions, 3378 events. 2162/3378 cut-off events. For 125817/125826 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17756 event pairs, 653 based on Foata normal form. 7/3376 useless extension candidates. Maximal degree in co-relation 20753. Up to 2750 conditions per place. [2024-06-14 12:18:02,256 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 85 selfloop transitions, 63 changer transitions 0/155 dead transitions. [2024-06-14 12:18:02,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 1420 flow [2024-06-14 12:18:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:18:02,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-14 12:18:02,257 INFO L175 Difference]: Start difference. First operand has 117 places, 129 transitions, 1058 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:18:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 1420 flow [2024-06-14 12:18:02,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 155 transitions, 1263 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:02,312 INFO L231 Difference]: Finished difference. Result has 118 places, 129 transitions, 1035 flow [2024-06-14 12:18:02,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=118, PETRI_TRANSITIONS=129} [2024-06-14 12:18:02,312 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2024-06-14 12:18:02,312 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 129 transitions, 1035 flow [2024-06-14 12:18:02,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:02,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:02,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:02,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:18:02,313 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 12:18:02,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash 572757209, now seen corresponding path program 2 times [2024-06-14 12:18:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:02,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266878001] [2024-06-14 12:18:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:02,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:03,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266878001] [2024-06-14 12:18:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266878001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:03,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:03,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886933997] [2024-06-14 12:18:03,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:03,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:03,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:03,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 129 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:03,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:03,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:03,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:03,608 INFO L124 PetriNetUnfolderBase]: 2045/3262 cut-off events. [2024-06-14 12:18:03,608 INFO L125 PetriNetUnfolderBase]: For 131782/131785 co-relation queries the response was YES. [2024-06-14 12:18:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20523 conditions, 3262 events. 2045/3262 cut-off events. For 131782/131785 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17572 event pairs, 659 based on Foata normal form. 3/3260 useless extension candidates. Maximal degree in co-relation 20470. Up to 2933 conditions per place. [2024-06-14 12:18:03,630 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 108 selfloop transitions, 19 changer transitions 0/142 dead transitions. [2024-06-14 12:18:03,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 1353 flow [2024-06-14 12:18:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:18:03,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:18:03,632 INFO L175 Difference]: Start difference. First operand has 118 places, 129 transitions, 1035 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:18:03,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 1353 flow [2024-06-14 12:18:03,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 142 transitions, 1203 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:18:03,694 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 985 flow [2024-06-14 12:18:03,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-14 12:18:03,695 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2024-06-14 12:18:03,695 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 985 flow [2024-06-14 12:18:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 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] [2024-06-14 12:18:03,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:18:03,695 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:03,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -408802629, now seen corresponding path program 1 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 [690349727] [2024-06-14 12:18:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:03,696 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 12:18:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:04,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:04,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690349727] [2024-06-14 12:18:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690349727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:04,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:04,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:04,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672949837] [2024-06-14 12:18:04,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:04,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:04,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:18:04,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:04,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:04,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:18:04,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:05,029 INFO L124 PetriNetUnfolderBase]: 1821/3019 cut-off events. [2024-06-14 12:18:05,029 INFO L125 PetriNetUnfolderBase]: For 120412/120412 co-relation queries the response was YES. [2024-06-14 12:18:05,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18657 conditions, 3019 events. 1821/3019 cut-off events. For 120412/120412 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16792 event pairs, 560 based on Foata normal form. 1/3017 useless extension candidates. Maximal degree in co-relation 18602. Up to 2618 conditions per place. [2024-06-14 12:18:05,054 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 120 selfloop transitions, 12 changer transitions 0/148 dead transitions. [2024-06-14 12:18:05,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 148 transitions, 1307 flow [2024-06-14 12:18:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:18:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:18:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 12:18:05,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703703703703704 [2024-06-14 12:18:05,055 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 985 flow. Second operand 6 states and 127 transitions. [2024-06-14 12:18:05,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 148 transitions, 1307 flow [2024-06-14 12:18:05,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 148 transitions, 1254 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:05,116 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 998 flow [2024-06-14 12:18:05,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=998, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-14 12:18:05,117 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-06-14 12:18:05,117 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 998 flow [2024-06-14 12:18:05,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:05,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:05,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:18:05,118 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:05,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash 572763161, now seen corresponding path program 2 times [2024-06-14 12:18:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:05,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414003288] [2024-06-14 12:18:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:05,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:05,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414003288] [2024-06-14 12:18:05,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414003288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:05,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:05,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:18:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309404627] [2024-06-14 12:18:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:05,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:18:05,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:18:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:18:05,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-06-14 12:18:05,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 998 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:05,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:05,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-06-14 12:18:05,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:06,413 INFO L124 PetriNetUnfolderBase]: 1818/3016 cut-off events. [2024-06-14 12:18:06,413 INFO L125 PetriNetUnfolderBase]: For 127052/127055 co-relation queries the response was YES. [2024-06-14 12:18:06,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19111 conditions, 3016 events. 1818/3016 cut-off events. For 127052/127055 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16806 event pairs, 564 based on Foata normal form. 3/3015 useless extension candidates. Maximal degree in co-relation 19054. Up to 2608 conditions per place. [2024-06-14 12:18:06,438 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 115 selfloop transitions, 17 changer transitions 0/148 dead transitions. [2024-06-14 12:18:06,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 148 transitions, 1318 flow [2024-06-14 12:18:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:18:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:18:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-14 12:18:06,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:18:06,440 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 998 flow. Second operand 6 states and 126 transitions. [2024-06-14 12:18:06,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 148 transitions, 1318 flow [2024-06-14 12:18:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 148 transitions, 1274 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:06,502 INFO L231 Difference]: Finished difference. Result has 123 places, 140 transitions, 1036 flow [2024-06-14 12:18:06,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=123, PETRI_TRANSITIONS=140} [2024-06-14 12:18:06,503 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2024-06-14 12:18:06,503 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 140 transitions, 1036 flow [2024-06-14 12:18:06,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:06,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:06,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:06,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:18:06,503 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 12:18:06,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash 707151878, now seen corresponding path program 1 times [2024-06-14 12:18:06,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:06,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104081985] [2024-06-14 12:18:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:07,642 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 12:18:07,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:07,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104081985] [2024-06-14 12:18:07,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104081985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:07,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:07,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:07,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900881688] [2024-06-14 12:18:07,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:07,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:07,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:07,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 140 transitions, 1036 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:07,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:07,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:07,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:08,512 INFO L124 PetriNetUnfolderBase]: 1910/3101 cut-off events. [2024-06-14 12:18:08,512 INFO L125 PetriNetUnfolderBase]: For 133891/133891 co-relation queries the response was YES. [2024-06-14 12:18:08,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19838 conditions, 3101 events. 1910/3101 cut-off events. For 133891/133891 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 16787 event pairs, 549 based on Foata normal form. 4/3102 useless extension candidates. Maximal degree in co-relation 19780. Up to 2738 conditions per place. [2024-06-14 12:18:08,550 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 144 selfloop transitions, 20 changer transitions 0/172 dead transitions. [2024-06-14 12:18:08,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1484 flow [2024-06-14 12:18:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 12:18:08,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2024-06-14 12:18:08,552 INFO L175 Difference]: Start difference. First operand has 123 places, 140 transitions, 1036 flow. Second operand 9 states and 183 transitions. [2024-06-14 12:18:08,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1484 flow [2024-06-14 12:18:08,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1424 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:08,604 INFO L231 Difference]: Finished difference. Result has 129 places, 145 transitions, 1085 flow [2024-06-14 12:18:08,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1085, PETRI_PLACES=129, PETRI_TRANSITIONS=145} [2024-06-14 12:18:08,604 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2024-06-14 12:18:08,604 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 145 transitions, 1085 flow [2024-06-14 12:18:08,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:08,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:18:08,605 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:08,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash 572773081, now seen corresponding path program 1 times [2024-06-14 12:18:08,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724267587] [2024-06-14 12:18:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:09,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724267587] [2024-06-14 12:18:09,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724267587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:09,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:09,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895093875] [2024-06-14 12:18:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:09,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:09,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 145 transitions, 1085 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:09,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:09,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:09,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:10,192 INFO L124 PetriNetUnfolderBase]: 1942/3127 cut-off events. [2024-06-14 12:18:10,192 INFO L125 PetriNetUnfolderBase]: For 139497/139497 co-relation queries the response was YES. [2024-06-14 12:18:10,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20549 conditions, 3127 events. 1942/3127 cut-off events. For 139497/139497 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16763 event pairs, 579 based on Foata normal form. 1/3125 useless extension candidates. Maximal degree in co-relation 20489. Up to 2840 conditions per place. [2024-06-14 12:18:10,216 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 128 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-06-14 12:18:10,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1433 flow [2024-06-14 12:18:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:18:10,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:18:10,218 INFO L175 Difference]: Start difference. First operand has 129 places, 145 transitions, 1085 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:18:10,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1433 flow [2024-06-14 12:18:10,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1364 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:10,270 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1098 flow [2024-06-14 12:18:10,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1098, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-06-14 12:18:10,271 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-06-14 12:18:10,271 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1098 flow [2024-06-14 12:18:10,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:10,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:10,271 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 12:18:10,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:18:10,272 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:10,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:10,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1544311904, now seen corresponding path program 1 times [2024-06-14 12:18:10,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:10,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054163221] [2024-06-14 12:18:10,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:11,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:11,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054163221] [2024-06-14 12:18:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054163221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:11,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:11,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440108884] [2024-06-14 12:18:11,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:11,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:11,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:11,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:11,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:11,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:11,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:11,938 INFO L124 PetriNetUnfolderBase]: 2168/3384 cut-off events. [2024-06-14 12:18:11,938 INFO L125 PetriNetUnfolderBase]: For 172891/172894 co-relation queries the response was YES. [2024-06-14 12:18:11,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23315 conditions, 3384 events. 2168/3384 cut-off events. For 172891/172894 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17636 event pairs, 453 based on Foata normal form. 4/3384 useless extension candidates. Maximal degree in co-relation 23254. Up to 2835 conditions per place. [2024-06-14 12:18:11,965 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 134 selfloop transitions, 41 changer transitions 0/182 dead transitions. [2024-06-14 12:18:11,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 182 transitions, 1706 flow [2024-06-14 12:18:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 12:18:11,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-14 12:18:11,967 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1098 flow. Second operand 8 states and 169 transitions. [2024-06-14 12:18:11,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 182 transitions, 1706 flow [2024-06-14 12:18:12,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 182 transitions, 1646 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:12,026 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 1187 flow [2024-06-14 12:18:12,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1187, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2024-06-14 12:18:12,026 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 87 predicate places. [2024-06-14 12:18:12,026 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 1187 flow [2024-06-14 12:18:12,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:12,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:12,027 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 12:18:12,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:18:12,027 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:12,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1542434234, now seen corresponding path program 2 times [2024-06-14 12:18:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:12,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715034408] [2024-06-14 12:18:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:12,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:12,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:12,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715034408] [2024-06-14 12:18:12,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715034408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:12,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:12,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427607061] [2024-06-14 12:18:12,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:13,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:13,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 1187 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:13,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:13,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:13,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:13,851 INFO L124 PetriNetUnfolderBase]: 2185/3411 cut-off events. [2024-06-14 12:18:13,851 INFO L125 PetriNetUnfolderBase]: For 182679/182682 co-relation queries the response was YES. [2024-06-14 12:18:13,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23955 conditions, 3411 events. 2185/3411 cut-off events. For 182679/182682 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17777 event pairs, 625 based on Foata normal form. 4/3411 useless extension candidates. Maximal degree in co-relation 23893. Up to 3015 conditions per place. [2024-06-14 12:18:13,877 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 134 selfloop transitions, 39 changer transitions 0/180 dead transitions. [2024-06-14 12:18:13,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 1633 flow [2024-06-14 12:18:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:18:13,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-14 12:18:13,879 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 1187 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:18:13,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 1633 flow [2024-06-14 12:18:13,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 180 transitions, 1553 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:13,958 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1228 flow [2024-06-14 12:18:13,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1228, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-14 12:18:13,959 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 91 predicate places. [2024-06-14 12:18:13,959 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1228 flow [2024-06-14 12:18:13,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:13,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:13,959 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 12:18:13,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:18:13,960 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 12:18:13,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1453627226, now seen corresponding path program 3 times [2024-06-14 12:18:13,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:13,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691825584] [2024-06-14 12:18:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:13,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:14,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691825584] [2024-06-14 12:18:14,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691825584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:14,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:14,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:14,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809663463] [2024-06-14 12:18:14,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:14,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:14,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:14,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:14,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:14,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1228 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:14,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:14,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:14,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:15,555 INFO L124 PetriNetUnfolderBase]: 2202/3438 cut-off events. [2024-06-14 12:18:15,556 INFO L125 PetriNetUnfolderBase]: For 192578/192581 co-relation queries the response was YES. [2024-06-14 12:18:15,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24412 conditions, 3438 events. 2202/3438 cut-off events. For 192578/192581 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17932 event pairs, 625 based on Foata normal form. 4/3438 useless extension candidates. Maximal degree in co-relation 24348. Up to 3001 conditions per place. [2024-06-14 12:18:15,583 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 134 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2024-06-14 12:18:15,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 183 transitions, 1678 flow [2024-06-14 12:18:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 12:18:15,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:18:15,584 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1228 flow. Second operand 8 states and 168 transitions. [2024-06-14 12:18:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 183 transitions, 1678 flow [2024-06-14 12:18:15,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 183 transitions, 1587 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:15,669 INFO L231 Difference]: Finished difference. Result has 139 places, 156 transitions, 1260 flow [2024-06-14 12:18:15,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1260, PETRI_PLACES=139, PETRI_TRANSITIONS=156} [2024-06-14 12:18:15,670 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 93 predicate places. [2024-06-14 12:18:15,670 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 156 transitions, 1260 flow [2024-06-14 12:18:15,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:15,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:15,670 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 12:18:15,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:18:15,671 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 12:18:15,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1807243360, now seen corresponding path program 4 times [2024-06-14 12:18:15,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:15,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618154913] [2024-06-14 12:18:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:15,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618154913] [2024-06-14 12:18:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618154913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:16,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:16,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869615429] [2024-06-14 12:18:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:16,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:16,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:16,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:16,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 1260 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:16,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:16,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:16,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:17,325 INFO L124 PetriNetUnfolderBase]: 2219/3465 cut-off events. [2024-06-14 12:18:17,325 INFO L125 PetriNetUnfolderBase]: For 202797/202800 co-relation queries the response was YES. [2024-06-14 12:18:17,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24837 conditions, 3465 events. 2219/3465 cut-off events. For 202797/202800 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18091 event pairs, 458 based on Foata normal form. 4/3465 useless extension candidates. Maximal degree in co-relation 24772. Up to 2982 conditions per place. [2024-06-14 12:18:17,357 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 135 selfloop transitions, 47 changer transitions 0/189 dead transitions. [2024-06-14 12:18:17,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1874 flow [2024-06-14 12:18:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 12:18:17,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-14 12:18:17,360 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 1260 flow. Second operand 8 states and 174 transitions. [2024-06-14 12:18:17,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1874 flow [2024-06-14 12:18:17,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 1773 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:17,464 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1292 flow [2024-06-14 12:18:17,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1292, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-14 12:18:17,465 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 95 predicate places. [2024-06-14 12:18:17,465 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1292 flow [2024-06-14 12:18:17,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:17,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:17,465 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 12:18:17,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:18:17,465 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 12:18:17,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1812753610, now seen corresponding path program 5 times [2024-06-14 12:18:17,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:17,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817016388] [2024-06-14 12:18:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:17,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:18,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817016388] [2024-06-14 12:18:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817016388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:18,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510807603] [2024-06-14 12:18:18,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:18,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:18,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:18,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:18,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:18,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:18,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:19,239 INFO L124 PetriNetUnfolderBase]: 2236/3492 cut-off events. [2024-06-14 12:18:19,240 INFO L125 PetriNetUnfolderBase]: For 213254/213257 co-relation queries the response was YES. [2024-06-14 12:18:19,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25267 conditions, 3492 events. 2236/3492 cut-off events. For 213254/213257 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18246 event pairs, 630 based on Foata normal form. 4/3492 useless extension candidates. Maximal degree in co-relation 25201. Up to 3096 conditions per place. [2024-06-14 12:18:19,269 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 140 selfloop transitions, 39 changer transitions 0/186 dead transitions. [2024-06-14 12:18:19,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 186 transitions, 1754 flow [2024-06-14 12:18:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 12:18:19,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-14 12:18:19,270 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1292 flow. Second operand 8 states and 166 transitions. [2024-06-14 12:18:19,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 186 transitions, 1754 flow [2024-06-14 12:18:19,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 186 transitions, 1627 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:19,396 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1290 flow [2024-06-14 12:18:19,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-06-14 12:18:19,396 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 97 predicate places. [2024-06-14 12:18:19,396 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1290 flow [2024-06-14 12:18:19,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:19,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:19,397 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 12:18:19,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:18:19,397 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:19,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1807247080, now seen corresponding path program 6 times [2024-06-14 12:18:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:19,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911461011] [2024-06-14 12:18:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:20,329 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 12:18:20,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:20,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911461011] [2024-06-14 12:18:20,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911461011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:20,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:20,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:20,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929969460] [2024-06-14 12:18:20,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:20,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:20,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:20,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:20,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:20,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1290 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:20,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:20,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:20,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:21,355 INFO L124 PetriNetUnfolderBase]: 2253/3519 cut-off events. [2024-06-14 12:18:21,355 INFO L125 PetriNetUnfolderBase]: For 223802/223805 co-relation queries the response was YES. [2024-06-14 12:18:21,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25585 conditions, 3519 events. 2253/3519 cut-off events. For 223802/223805 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18439 event pairs, 630 based on Foata normal form. 4/3519 useless extension candidates. Maximal degree in co-relation 25518. Up to 3123 conditions per place. [2024-06-14 12:18:21,383 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 140 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2024-06-14 12:18:21,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 190 transitions, 1766 flow [2024-06-14 12:18:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 12:18:21,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:18:21,385 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1290 flow. Second operand 8 states and 170 transitions. [2024-06-14 12:18:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 190 transitions, 1766 flow [2024-06-14 12:18:21,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 190 transitions, 1667 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:21,489 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1324 flow [2024-06-14 12:18:21,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-14 12:18:21,490 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-06-14 12:18:21,490 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1324 flow [2024-06-14 12:18:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:21,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:21,491 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 12:18:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:18:21,491 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 12:18:21,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 162286049, now seen corresponding path program 1 times [2024-06-14 12:18:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:21,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102575079] [2024-06-14 12:18:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:21,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:22,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:22,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102575079] [2024-06-14 12:18:22,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102575079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:22,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192262936] [2024-06-14 12:18:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:22,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:22,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:22,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:22,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:22,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:22,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:23,157 INFO L124 PetriNetUnfolderBase]: 2133/3405 cut-off events. [2024-06-14 12:18:23,157 INFO L125 PetriNetUnfolderBase]: For 232985/232988 co-relation queries the response was YES. [2024-06-14 12:18:23,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25245 conditions, 3405 events. 2133/3405 cut-off events. For 232985/232988 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18385 event pairs, 620 based on Foata normal form. 4/3405 useless extension candidates. Maximal degree in co-relation 25177. Up to 2972 conditions per place. [2024-06-14 12:18:23,186 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 138 selfloop transitions, 26 changer transitions 0/186 dead transitions. [2024-06-14 12:18:23,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 186 transitions, 1758 flow [2024-06-14 12:18:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 12:18:23,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48253968253968255 [2024-06-14 12:18:23,200 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1324 flow. Second operand 7 states and 152 transitions. [2024-06-14 12:18:23,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 186 transitions, 1758 flow [2024-06-14 12:18:23,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 186 transitions, 1647 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:23,318 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1332 flow [2024-06-14 12:18:23,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1332, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-06-14 12:18:23,322 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 100 predicate places. [2024-06-14 12:18:23,322 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1332 flow [2024-06-14 12:18:23,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:23,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:23,324 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 12:18:23,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:18:23,326 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 12:18:23,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash 528791779, now seen corresponding path program 1 times [2024-06-14 12:18:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723826553] [2024-06-14 12:18:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:24,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:24,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723826553] [2024-06-14 12:18:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723826553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:24,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472963273] [2024-06-14 12:18:24,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:24,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:24,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:24,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1332 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:24,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:24,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:24,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:24,805 INFO L124 PetriNetUnfolderBase]: 2271/3544 cut-off events. [2024-06-14 12:18:24,806 INFO L125 PetriNetUnfolderBase]: For 241975/241975 co-relation queries the response was YES. [2024-06-14 12:18:24,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26479 conditions, 3544 events. 2271/3544 cut-off events. For 241975/241975 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18637 event pairs, 663 based on Foata normal form. 1/3542 useless extension candidates. Maximal degree in co-relation 26410. Up to 3281 conditions per place. [2024-06-14 12:18:24,836 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 147 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-14 12:18:24,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 183 transitions, 1734 flow [2024-06-14 12:18:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:18:24,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:18:24,838 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1332 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:18:24,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 183 transitions, 1734 flow [2024-06-14 12:18:24,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 183 transitions, 1643 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:24,986 INFO L231 Difference]: Finished difference. Result has 148 places, 169 transitions, 1325 flow [2024-06-14 12:18:24,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1325, PETRI_PLACES=148, PETRI_TRANSITIONS=169} [2024-06-14 12:18:24,986 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 102 predicate places. [2024-06-14 12:18:24,986 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 169 transitions, 1325 flow [2024-06-14 12:18:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:24,987 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 12:18:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:18:24,987 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 12:18:24,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash 528791345, now seen corresponding path program 2 times [2024-06-14 12:18:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687266152] [2024-06-14 12:18:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:24,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687266152] [2024-06-14 12:18:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687266152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:25,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:25,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137667369] [2024-06-14 12:18:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:25,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:25,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:25,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:25,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 1325 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:25,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:25,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:25,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:26,481 INFO L124 PetriNetUnfolderBase]: 2182/3474 cut-off events. [2024-06-14 12:18:26,482 INFO L125 PetriNetUnfolderBase]: For 256864/256867 co-relation queries the response was YES. [2024-06-14 12:18:26,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26835 conditions, 3474 events. 2182/3474 cut-off events. For 256864/256867 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18731 event pairs, 618 based on Foata normal form. 4/3474 useless extension candidates. Maximal degree in co-relation 26765. Up to 3006 conditions per place. [2024-06-14 12:18:26,512 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 140 selfloop transitions, 30 changer transitions 0/193 dead transitions. [2024-06-14 12:18:26,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 193 transitions, 1909 flow [2024-06-14 12:18:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 12:18:26,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2024-06-14 12:18:26,514 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 1325 flow. Second operand 7 states and 148 transitions. [2024-06-14 12:18:26,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 193 transitions, 1909 flow [2024-06-14 12:18:26,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 193 transitions, 1847 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:26,649 INFO L231 Difference]: Finished difference. Result has 151 places, 177 transitions, 1471 flow [2024-06-14 12:18:26,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1471, PETRI_PLACES=151, PETRI_TRANSITIONS=177} [2024-06-14 12:18:26,650 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 105 predicate places. [2024-06-14 12:18:26,650 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 177 transitions, 1471 flow [2024-06-14 12:18:26,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:26,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:26,650 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 12:18:26,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:18:26,651 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:26,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 180622188, now seen corresponding path program 7 times [2024-06-14 12:18:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044693568] [2024-06-14 12:18:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:26,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:27,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:27,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044693568] [2024-06-14 12:18:27,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044693568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:27,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:27,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:18:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101355346] [2024-06-14 12:18:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:18:27,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:18:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:18:27,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:27,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 177 transitions, 1471 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:27,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:27,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:27,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:28,444 INFO L124 PetriNetUnfolderBase]: 2304/3593 cut-off events. [2024-06-14 12:18:28,444 INFO L125 PetriNetUnfolderBase]: For 270045/270048 co-relation queries the response was YES. [2024-06-14 12:18:28,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28197 conditions, 3593 events. 2304/3593 cut-off events. For 270045/270048 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18871 event pairs, 651 based on Foata normal form. 6/3591 useless extension candidates. Maximal degree in co-relation 28125. Up to 3185 conditions per place. [2024-06-14 12:18:28,476 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 157 selfloop transitions, 36 changer transitions 0/201 dead transitions. [2024-06-14 12:18:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 201 transitions, 1919 flow [2024-06-14 12:18:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:18:28,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:18:28,478 INFO L175 Difference]: Start difference. First operand has 151 places, 177 transitions, 1471 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:18:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 201 transitions, 1919 flow [2024-06-14 12:18:28,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 201 transitions, 1812 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:28,646 INFO L231 Difference]: Finished difference. Result has 156 places, 177 transitions, 1443 flow [2024-06-14 12:18:28,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=156, PETRI_TRANSITIONS=177} [2024-06-14 12:18:28,648 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2024-06-14 12:18:28,649 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 177 transitions, 1443 flow [2024-06-14 12:18:28,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:28,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:28,649 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 12:18:28,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:18:28,649 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 12:18:28,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash 573226869, now seen corresponding path program 2 times [2024-06-14 12:18:28,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:28,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017392729] [2024-06-14 12:18:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:28,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017392729] [2024-06-14 12:18:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017392729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115081278] [2024-06-14 12:18:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:29,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:29,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 177 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:29,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:29,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:29,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:30,236 INFO L124 PetriNetUnfolderBase]: 2296/3587 cut-off events. [2024-06-14 12:18:30,237 INFO L125 PetriNetUnfolderBase]: For 277410/277413 co-relation queries the response was YES. [2024-06-14 12:18:30,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28386 conditions, 3587 events. 2296/3587 cut-off events. For 277410/277413 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18918 event pairs, 668 based on Foata normal form. 3/3585 useless extension candidates. Maximal degree in co-relation 28312. Up to 3303 conditions per place. [2024-06-14 12:18:30,283 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 146 selfloop transitions, 27 changer transitions 0/193 dead transitions. [2024-06-14 12:18:30,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 193 transitions, 2003 flow [2024-06-14 12:18:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:18:30,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2024-06-14 12:18:30,284 INFO L175 Difference]: Start difference. First operand has 156 places, 177 transitions, 1443 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:18:30,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 193 transitions, 2003 flow [2024-06-14 12:18:30,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 193 transitions, 1909 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:30,514 INFO L231 Difference]: Finished difference. Result has 156 places, 183 transitions, 1515 flow [2024-06-14 12:18:30,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=156, PETRI_TRANSITIONS=183} [2024-06-14 12:18:30,515 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2024-06-14 12:18:30,515 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 183 transitions, 1515 flow [2024-06-14 12:18:30,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:30,515 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 12:18:30,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:18:30,516 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 12:18:30,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash 575605019, now seen corresponding path program 3 times [2024-06-14 12:18:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:30,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203077861] [2024-06-14 12:18:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:31,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203077861] [2024-06-14 12:18:31,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203077861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:31,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:31,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791804698] [2024-06-14 12:18:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:31,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:31,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:31,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:31,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 183 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:31,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:31,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:31,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:32,021 INFO L124 PetriNetUnfolderBase]: 2183/3477 cut-off events. [2024-06-14 12:18:32,022 INFO L125 PetriNetUnfolderBase]: For 291570/291573 co-relation queries the response was YES. [2024-06-14 12:18:32,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28318 conditions, 3477 events. 2183/3477 cut-off events. For 291570/291573 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18742 event pairs, 643 based on Foata normal form. 4/3473 useless extension candidates. Maximal degree in co-relation 28243. Up to 2978 conditions per place. [2024-06-14 12:18:32,056 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 136 selfloop transitions, 42 changer transitions 0/203 dead transitions. [2024-06-14 12:18:32,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 203 transitions, 2221 flow [2024-06-14 12:18:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 12:18:32,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-14 12:18:32,057 INFO L175 Difference]: Start difference. First operand has 156 places, 183 transitions, 1515 flow. Second operand 7 states and 146 transitions. [2024-06-14 12:18:32,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 203 transitions, 2221 flow [2024-06-14 12:18:32,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 203 transitions, 2152 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 12:18:32,240 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 1694 flow [2024-06-14 12:18:32,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1694, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-14 12:18:32,240 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 115 predicate places. [2024-06-14 12:18:32,241 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 1694 flow [2024-06-14 12:18:32,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:32,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:32,241 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 12:18:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:18:32,241 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 12:18:32,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash 576080683, now seen corresponding path program 3 times [2024-06-14 12:18:32,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:32,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496074665] [2024-06-14 12:18:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:33,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:33,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496074665] [2024-06-14 12:18:33,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496074665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:33,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:33,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71978368] [2024-06-14 12:18:33,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:33,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:33,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:33,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:33,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 1694 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:33,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:33,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:33,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:33,849 INFO L124 PetriNetUnfolderBase]: 2297/3590 cut-off events. [2024-06-14 12:18:33,849 INFO L125 PetriNetUnfolderBase]: For 303825/303828 co-relation queries the response was YES. [2024-06-14 12:18:33,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29732 conditions, 3590 events. 2297/3590 cut-off events. For 303825/303828 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18992 event pairs, 667 based on Foata normal form. 3/3588 useless extension candidates. Maximal degree in co-relation 29654. Up to 3306 conditions per place. [2024-06-14 12:18:33,886 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 152 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-14 12:18:33,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 200 transitions, 2076 flow [2024-06-14 12:18:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:18:33,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 12:18:33,888 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 1694 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:18:33,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 200 transitions, 2076 flow [2024-06-14 12:18:34,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 200 transitions, 1892 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:34,163 INFO L231 Difference]: Finished difference. Result has 164 places, 191 transitions, 1572 flow [2024-06-14 12:18:34,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1572, PETRI_PLACES=164, PETRI_TRANSITIONS=191} [2024-06-14 12:18:34,163 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 118 predicate places. [2024-06-14 12:18:34,163 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 191 transitions, 1572 flow [2024-06-14 12:18:34,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:34,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:34,164 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 12:18:34,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:18:34,164 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 12:18:34,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash 211841809, now seen corresponding path program 1 times [2024-06-14 12:18:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:34,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448551765] [2024-06-14 12:18:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:34,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:34,925 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 12:18:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448551765] [2024-06-14 12:18:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448551765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:34,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739602398] [2024-06-14 12:18:34,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:34,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:34,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 191 transitions, 1572 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:34,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:34,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:34,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:35,588 INFO L124 PetriNetUnfolderBase]: 2074/3345 cut-off events. [2024-06-14 12:18:35,588 INFO L125 PetriNetUnfolderBase]: For 270782/270782 co-relation queries the response was YES. [2024-06-14 12:18:35,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26484 conditions, 3345 events. 2074/3345 cut-off events. For 270782/270782 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18066 event pairs, 529 based on Foata normal form. 1/3343 useless extension candidates. Maximal degree in co-relation 26405. Up to 3009 conditions per place. [2024-06-14 12:18:35,621 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 183 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2024-06-14 12:18:35,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 209 transitions, 2052 flow [2024-06-14 12:18:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 12:18:35,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-14 12:18:35,623 INFO L175 Difference]: Start difference. First operand has 164 places, 191 transitions, 1572 flow. Second operand 7 states and 141 transitions. [2024-06-14 12:18:35,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 209 transitions, 2052 flow [2024-06-14 12:18:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 209 transitions, 1988 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:35,845 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 1596 flow [2024-06-14 12:18:35,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2024-06-14 12:18:35,846 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 119 predicate places. [2024-06-14 12:18:35,846 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 1596 flow [2024-06-14 12:18:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:35,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:35,846 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 12:18:35,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:18:35,847 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 12:18:35,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:35,847 INFO L85 PathProgramCache]: Analyzing trace with hash 565137171, now seen corresponding path program 1 times [2024-06-14 12:18:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482075430] [2024-06-14 12:18:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:35,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482075430] [2024-06-14 12:18:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482075430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:36,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:36,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:36,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702012718] [2024-06-14 12:18:36,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:36,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:36,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 1596 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:36,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:36,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:36,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:37,422 INFO L124 PetriNetUnfolderBase]: 2091/3364 cut-off events. [2024-06-14 12:18:37,422 INFO L125 PetriNetUnfolderBase]: For 279989/279989 co-relation queries the response was YES. [2024-06-14 12:18:37,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26987 conditions, 3364 events. 2091/3364 cut-off events. For 279989/279989 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18214 event pairs, 571 based on Foata normal form. 1/3362 useless extension candidates. Maximal degree in co-relation 26907. Up to 3009 conditions per place. [2024-06-14 12:18:37,458 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 172 selfloop transitions, 15 changer transitions 0/209 dead transitions. [2024-06-14 12:18:37,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2048 flow [2024-06-14 12:18:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:18:37,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 12:18:37,459 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 1596 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:18:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2048 flow [2024-06-14 12:18:37,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 209 transitions, 1982 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:37,664 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 1620 flow [2024-06-14 12:18:37,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1620, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-14 12:18:37,667 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 121 predicate places. [2024-06-14 12:18:37,667 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 1620 flow [2024-06-14 12:18:37,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:37,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:37,668 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 12:18:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:18:37,668 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 12:18:37,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 339614357, now seen corresponding path program 2 times [2024-06-14 12:18:37,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:37,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652706221] [2024-06-14 12:18:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:37,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:38,568 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 12:18:38,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652706221] [2024-06-14 12:18:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652706221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:38,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:38,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069585120] [2024-06-14 12:18:38,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:38,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:38,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:38,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:38,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 1620 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:38,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:38,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:38,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:39,288 INFO L124 PetriNetUnfolderBase]: 2094/3369 cut-off events. [2024-06-14 12:18:39,288 INFO L125 PetriNetUnfolderBase]: For 292666/292666 co-relation queries the response was YES. [2024-06-14 12:18:39,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27646 conditions, 3369 events. 2094/3369 cut-off events. For 292666/292666 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18125 event pairs, 528 based on Foata normal form. 1/3367 useless extension candidates. Maximal degree in co-relation 27565. Up to 3025 conditions per place. [2024-06-14 12:18:39,319 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 180 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2024-06-14 12:18:39,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 212 transitions, 2104 flow [2024-06-14 12:18:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:18:39,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:18:39,322 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 1620 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:18:39,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 212 transitions, 2104 flow [2024-06-14 12:18:39,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 212 transitions, 2036 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:39,535 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 1658 flow [2024-06-14 12:18:39,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1658, PETRI_PLACES=169, PETRI_TRANSITIONS=200} [2024-06-14 12:18:39,535 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 123 predicate places. [2024-06-14 12:18:39,535 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 1658 flow [2024-06-14 12:18:39,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:39,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:39,536 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 12:18:39,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:18:39,536 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 12:18:39,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash 573708051, now seen corresponding path program 2 times [2024-06-14 12:18:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349919962] [2024-06-14 12:18:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:39,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:40,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349919962] [2024-06-14 12:18:40,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349919962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:40,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:40,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512510983] [2024-06-14 12:18:40,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:40,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:40,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 200 transitions, 1658 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:40,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:40,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:40,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:41,039 INFO L124 PetriNetUnfolderBase]: 2101/3379 cut-off events. [2024-06-14 12:18:41,039 INFO L125 PetriNetUnfolderBase]: For 302093/302096 co-relation queries the response was YES. [2024-06-14 12:18:41,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28024 conditions, 3379 events. 2101/3379 cut-off events. For 302093/302096 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18296 event pairs, 575 based on Foata normal form. 3/3378 useless extension candidates. Maximal degree in co-relation 27942. Up to 3005 conditions per place. [2024-06-14 12:18:41,180 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 165 selfloop transitions, 28 changer transitions 0/216 dead transitions. [2024-06-14 12:18:41,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 216 transitions, 2282 flow [2024-06-14 12:18:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:18:41,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-14 12:18:41,181 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 1658 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:18:41,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 216 transitions, 2282 flow [2024-06-14 12:18:41,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 216 transitions, 2198 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:41,381 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 1754 flow [2024-06-14 12:18:41,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1754, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-14 12:18:41,381 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2024-06-14 12:18:41,381 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 1754 flow [2024-06-14 12:18:41,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:41,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:41,382 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 12:18:41,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:18:41,382 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 12:18:41,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash 575789965, now seen corresponding path program 3 times [2024-06-14 12:18:41,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:41,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295277149] [2024-06-14 12:18:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:41,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:42,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:42,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295277149] [2024-06-14 12:18:42,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295277149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:42,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:42,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:42,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070100880] [2024-06-14 12:18:42,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:42,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:42,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:42,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:42,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 1754 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:42,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:42,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:42,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:43,121 INFO L124 PetriNetUnfolderBase]: 2098/3375 cut-off events. [2024-06-14 12:18:43,122 INFO L125 PetriNetUnfolderBase]: For 313275/313278 co-relation queries the response was YES. [2024-06-14 12:18:43,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28412 conditions, 3375 events. 2098/3375 cut-off events. For 313275/313278 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18254 event pairs, 575 based on Foata normal form. 3/3374 useless extension candidates. Maximal degree in co-relation 28329. Up to 3002 conditions per place. [2024-06-14 12:18:43,153 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 165 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-14 12:18:43,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 215 transitions, 2160 flow [2024-06-14 12:18:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:18:43,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-14 12:18:43,154 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 1754 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:18:43,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 215 transitions, 2160 flow [2024-06-14 12:18:43,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 215 transitions, 2044 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:43,385 INFO L231 Difference]: Finished difference. Result has 174 places, 206 transitions, 1698 flow [2024-06-14 12:18:43,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=174, PETRI_TRANSITIONS=206} [2024-06-14 12:18:43,385 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2024-06-14 12:18:43,385 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 206 transitions, 1698 flow [2024-06-14 12:18:43,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:43,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:43,386 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 12:18:43,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:18:43,386 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 12:18:43,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash 575789717, now seen corresponding path program 3 times [2024-06-14 12:18:43,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:43,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546497579] [2024-06-14 12:18:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:43,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:44,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546497579] [2024-06-14 12:18:44,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546497579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:44,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:44,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949692701] [2024-06-14 12:18:44,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:44,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:44,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:18:44,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 206 transitions, 1698 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:44,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:44,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:18:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:44,817 INFO L124 PetriNetUnfolderBase]: 2093/3369 cut-off events. [2024-06-14 12:18:44,817 INFO L125 PetriNetUnfolderBase]: For 321901/321904 co-relation queries the response was YES. [2024-06-14 12:18:44,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28546 conditions, 3369 events. 2093/3369 cut-off events. For 321901/321904 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18184 event pairs, 536 based on Foata normal form. 1/3366 useless extension candidates. Maximal degree in co-relation 28462. Up to 3014 conditions per place. [2024-06-14 12:18:44,848 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 177 selfloop transitions, 27 changer transitions 0/218 dead transitions. [2024-06-14 12:18:44,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 218 transitions, 2188 flow [2024-06-14 12:18:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:18:44,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44126984126984126 [2024-06-14 12:18:44,850 INFO L175 Difference]: Start difference. First operand has 174 places, 206 transitions, 1698 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:18:44,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 218 transitions, 2188 flow [2024-06-14 12:18:45,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 218 transitions, 2114 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:45,072 INFO L231 Difference]: Finished difference. Result has 175 places, 209 transitions, 1750 flow [2024-06-14 12:18:45,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=175, PETRI_TRANSITIONS=209} [2024-06-14 12:18:45,072 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 129 predicate places. [2024-06-14 12:18:45,072 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 209 transitions, 1750 flow [2024-06-14 12:18:45,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:45,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:45,073 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 12:18:45,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:18:45,074 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:45,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash 950802349, now seen corresponding path program 1 times [2024-06-14 12:18:45,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:45,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206587543] [2024-06-14 12:18:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:45,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206587543] [2024-06-14 12:18:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206587543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:45,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:45,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:45,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525963208] [2024-06-14 12:18:45,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:45,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:45,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:46,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:46,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 209 transitions, 1750 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:46,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:46,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:46,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:46,905 INFO L124 PetriNetUnfolderBase]: 2488/3884 cut-off events. [2024-06-14 12:18:46,905 INFO L125 PetriNetUnfolderBase]: For 428026/428045 co-relation queries the response was YES. [2024-06-14 12:18:46,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34363 conditions, 3884 events. 2488/3884 cut-off events. For 428026/428045 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20647 event pairs, 423 based on Foata normal form. 16/3892 useless extension candidates. Maximal degree in co-relation 34278. Up to 2555 conditions per place. [2024-06-14 12:18:46,948 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 170 selfloop transitions, 72 changer transitions 0/255 dead transitions. [2024-06-14 12:18:46,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 2610 flow [2024-06-14 12:18:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 12:18:46,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 12:18:46,971 INFO L175 Difference]: Start difference. First operand has 175 places, 209 transitions, 1750 flow. Second operand 9 states and 198 transitions. [2024-06-14 12:18:46,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 2610 flow [2024-06-14 12:18:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 255 transitions, 2506 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:47,279 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 1846 flow [2024-06-14 12:18:47,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-06-14 12:18:47,280 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 133 predicate places. [2024-06-14 12:18:47,280 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 1846 flow [2024-06-14 12:18:47,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:47,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:47,280 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 12:18:47,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:18:47,280 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:47,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:47,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1069067659, now seen corresponding path program 2 times [2024-06-14 12:18:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144243442] [2024-06-14 12:18:47,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:48,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:48,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144243442] [2024-06-14 12:18:48,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144243442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:48,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:48,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:48,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060337173] [2024-06-14 12:18:48,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:48,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:48,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:48,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:48,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 1846 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:48,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:48,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:48,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:49,368 INFO L124 PetriNetUnfolderBase]: 2584/4058 cut-off events. [2024-06-14 12:18:49,369 INFO L125 PetriNetUnfolderBase]: For 451259/451262 co-relation queries the response was YES. [2024-06-14 12:18:49,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35846 conditions, 4058 events. 2584/4058 cut-off events. For 451259/451262 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22060 event pairs, 655 based on Foata normal form. 24/4078 useless extension candidates. Maximal degree in co-relation 35760. Up to 3260 conditions per place. [2024-06-14 12:18:49,423 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 170 selfloop transitions, 66 changer transitions 0/249 dead transitions. [2024-06-14 12:18:49,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 249 transitions, 2476 flow [2024-06-14 12:18:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 12:18:49,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:18:49,425 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 1846 flow. Second operand 9 states and 195 transitions. [2024-06-14 12:18:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 249 transitions, 2476 flow [2024-06-14 12:18:49,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2388 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:49,889 INFO L231 Difference]: Finished difference. Result has 183 places, 213 transitions, 1950 flow [2024-06-14 12:18:49,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1950, PETRI_PLACES=183, PETRI_TRANSITIONS=213} [2024-06-14 12:18:49,890 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 137 predicate places. [2024-06-14 12:18:49,890 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 213 transitions, 1950 flow [2024-06-14 12:18:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:49,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:49,891 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 12:18:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:18:49,891 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:49,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1068890029, now seen corresponding path program 3 times [2024-06-14 12:18:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:49,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2822622] [2024-06-14 12:18:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:51,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2822622] [2024-06-14 12:18:51,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2822622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:51,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:51,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:51,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47739898] [2024-06-14 12:18:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:51,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:51,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 213 transitions, 1950 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:51,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:51,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:51,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:52,234 INFO L124 PetriNetUnfolderBase]: 2642/4166 cut-off events. [2024-06-14 12:18:52,235 INFO L125 PetriNetUnfolderBase]: For 462087/462090 co-relation queries the response was YES. [2024-06-14 12:18:52,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36989 conditions, 4166 events. 2642/4166 cut-off events. For 462087/462090 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22923 event pairs, 655 based on Foata normal form. 16/4178 useless extension candidates. Maximal degree in co-relation 36901. Up to 3248 conditions per place. [2024-06-14 12:18:52,276 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 173 selfloop transitions, 68 changer transitions 0/254 dead transitions. [2024-06-14 12:18:52,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 2584 flow [2024-06-14 12:18:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 12:18:52,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 12:18:52,278 INFO L175 Difference]: Start difference. First operand has 183 places, 213 transitions, 1950 flow. Second operand 9 states and 198 transitions. [2024-06-14 12:18:52,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 2584 flow [2024-06-14 12:18:52,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 254 transitions, 2422 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:52,630 INFO L231 Difference]: Finished difference. Result has 185 places, 214 transitions, 1960 flow [2024-06-14 12:18:52,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1960, PETRI_PLACES=185, PETRI_TRANSITIONS=214} [2024-06-14 12:18:52,631 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 139 predicate places. [2024-06-14 12:18:52,631 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 214 transitions, 1960 flow [2024-06-14 12:18:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:52,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:52,631 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 12:18:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:18:52,631 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:52,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1623140051, now seen corresponding path program 4 times [2024-06-14 12:18:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:52,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337726371] [2024-06-14 12:18:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337726371] [2024-06-14 12:18:53,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337726371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:53,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66892643] [2024-06-14 12:18:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:53,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:53,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:53,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:53,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:53,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 214 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:53,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:53,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:53,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:54,710 INFO L124 PetriNetUnfolderBase]: 2700/4274 cut-off events. [2024-06-14 12:18:54,711 INFO L125 PetriNetUnfolderBase]: For 478580/478583 co-relation queries the response was YES. [2024-06-14 12:18:54,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37567 conditions, 4274 events. 2700/4274 cut-off events. For 478580/478583 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23745 event pairs, 670 based on Foata normal form. 16/4286 useless extension candidates. Maximal degree in co-relation 37478. Up to 3213 conditions per place. [2024-06-14 12:18:54,752 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 172 selfloop transitions, 71 changer transitions 0/256 dead transitions. [2024-06-14 12:18:54,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 256 transitions, 2602 flow [2024-06-14 12:18:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 12:18:54,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49135802469135803 [2024-06-14 12:18:54,754 INFO L175 Difference]: Start difference. First operand has 185 places, 214 transitions, 1960 flow. Second operand 9 states and 199 transitions. [2024-06-14 12:18:54,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 256 transitions, 2602 flow [2024-06-14 12:18:55,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 256 transitions, 2448 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:55,047 INFO L231 Difference]: Finished difference. Result has 187 places, 215 transitions, 1986 flow [2024-06-14 12:18:55,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=187, PETRI_TRANSITIONS=215} [2024-06-14 12:18:55,048 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 141 predicate places. [2024-06-14 12:18:55,048 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 215 transitions, 1986 flow [2024-06-14 12:18:55,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:55,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:55,048 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 12:18:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:18:55,049 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:55,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash 471590607, now seen corresponding path program 5 times [2024-06-14 12:18:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:55,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448893559] [2024-06-14 12:18:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:55,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:55,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448893559] [2024-06-14 12:18:55,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448893559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:55,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:55,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879264343] [2024-06-14 12:18:55,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:55,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:55,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:56,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 215 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:57,308 INFO L124 PetriNetUnfolderBase]: 2819/4485 cut-off events. [2024-06-14 12:18:57,308 INFO L125 PetriNetUnfolderBase]: For 511432/511435 co-relation queries the response was YES. [2024-06-14 12:18:57,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39403 conditions, 4485 events. 2819/4485 cut-off events. For 511432/511435 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25399 event pairs, 541 based on Foata normal form. 16/4497 useless extension candidates. Maximal degree in co-relation 39313. Up to 3307 conditions per place. [2024-06-14 12:18:57,364 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 170 selfloop transitions, 79 changer transitions 0/262 dead transitions. [2024-06-14 12:18:57,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 262 transitions, 2878 flow [2024-06-14 12:18:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 12:18:57,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2024-06-14 12:18:57,366 INFO L175 Difference]: Start difference. First operand has 187 places, 215 transitions, 1986 flow. Second operand 9 states and 204 transitions. [2024-06-14 12:18:57,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 262 transitions, 2878 flow [2024-06-14 12:18:57,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 262 transitions, 2716 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:57,769 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2054 flow [2024-06-14 12:18:57,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2054, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-14 12:18:57,770 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 143 predicate places. [2024-06-14 12:18:57,770 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2054 flow [2024-06-14 12:18:57,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:57,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:57,771 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 12:18:57,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:18:57,771 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:57,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1194575003, now seen corresponding path program 6 times [2024-06-14 12:18:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:57,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864510669] [2024-06-14 12:18:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:58,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:58,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864510669] [2024-06-14 12:18:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864510669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:58,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100121247] [2024-06-14 12:18:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:18:58,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2054 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:58,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:58,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:18:58,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:59,959 INFO L124 PetriNetUnfolderBase]: 2894/4610 cut-off events. [2024-06-14 12:18:59,959 INFO L125 PetriNetUnfolderBase]: For 535305/535308 co-relation queries the response was YES. [2024-06-14 12:18:59,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40287 conditions, 4610 events. 2894/4610 cut-off events. For 535305/535308 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26339 event pairs, 744 based on Foata normal form. 20/4626 useless extension candidates. Maximal degree in co-relation 40196. Up to 3800 conditions per place. [2024-06-14 12:19:00,005 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 175 selfloop transitions, 67 changer transitions 0/255 dead transitions. [2024-06-14 12:19:00,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 2686 flow [2024-06-14 12:19:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 12:19:00,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47901234567901235 [2024-06-14 12:19:00,007 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2054 flow. Second operand 9 states and 194 transitions. [2024-06-14 12:19:00,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 2686 flow [2024-06-14 12:19:00,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 255 transitions, 2571 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:00,432 INFO L231 Difference]: Finished difference. Result has 193 places, 218 transitions, 2116 flow [2024-06-14 12:19:00,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2116, PETRI_PLACES=193, PETRI_TRANSITIONS=218} [2024-06-14 12:19:00,432 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 147 predicate places. [2024-06-14 12:19:00,432 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 218 transitions, 2116 flow [2024-06-14 12:19:00,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:00,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:00,433 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 12:19:00,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:19:00,433 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:00,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1413171267, now seen corresponding path program 7 times [2024-06-14 12:19:00,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:00,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728951978] [2024-06-14 12:19:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:00,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:01,404 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 12:19:01,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:01,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728951978] [2024-06-14 12:19:01,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728951978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:01,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:01,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:01,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449399892] [2024-06-14 12:19:01,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:01,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:01,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 218 transitions, 2116 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:01,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:01,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:01,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:02,635 INFO L124 PetriNetUnfolderBase]: 2969/4745 cut-off events. [2024-06-14 12:19:02,635 INFO L125 PetriNetUnfolderBase]: For 553960/553963 co-relation queries the response was YES. [2024-06-14 12:19:02,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41381 conditions, 4745 events. 2969/4745 cut-off events. For 553960/553963 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27494 event pairs, 768 based on Foata normal form. 20/4761 useless extension candidates. Maximal degree in co-relation 41288. Up to 3925 conditions per place. [2024-06-14 12:19:02,688 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 178 selfloop transitions, 66 changer transitions 0/257 dead transitions. [2024-06-14 12:19:02,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 257 transitions, 2758 flow [2024-06-14 12:19:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 12:19:02,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839506172839506 [2024-06-14 12:19:02,690 INFO L175 Difference]: Start difference. First operand has 193 places, 218 transitions, 2116 flow. Second operand 9 states and 196 transitions. [2024-06-14 12:19:02,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 257 transitions, 2758 flow [2024-06-14 12:19:03,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 2607 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:03,123 INFO L231 Difference]: Finished difference. Result has 195 places, 219 transitions, 2142 flow [2024-06-14 12:19:03,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=195, PETRI_TRANSITIONS=219} [2024-06-14 12:19:03,124 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 149 predicate places. [2024-06-14 12:19:03,124 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 219 transitions, 2142 flow [2024-06-14 12:19:03,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:03,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:03,124 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 12:19:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:19:03,125 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:03,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash 642408357, now seen corresponding path program 8 times [2024-06-14 12:19:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369157024] [2024-06-14 12:19:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:03,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:04,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:04,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369157024] [2024-06-14 12:19:04,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369157024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:04,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:04,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:04,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032701529] [2024-06-14 12:19:04,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:04,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:04,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:04,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:04,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 2142 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:04,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:04,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:04,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:05,539 INFO L124 PetriNetUnfolderBase]: 3027/4843 cut-off events. [2024-06-14 12:19:05,539 INFO L125 PetriNetUnfolderBase]: For 567575/567578 co-relation queries the response was YES. [2024-06-14 12:19:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42056 conditions, 4843 events. 3027/4843 cut-off events. For 567575/567578 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28154 event pairs, 754 based on Foata normal form. 16/4855 useless extension candidates. Maximal degree in co-relation 41962. Up to 3793 conditions per place. [2024-06-14 12:19:05,590 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 179 selfloop transitions, 69 changer transitions 0/261 dead transitions. [2024-06-14 12:19:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 2804 flow [2024-06-14 12:19:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 12:19:05,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 12:19:05,592 INFO L175 Difference]: Start difference. First operand has 195 places, 219 transitions, 2142 flow. Second operand 9 states and 198 transitions. [2024-06-14 12:19:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 2804 flow [2024-06-14 12:19:06,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 2653 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:06,034 INFO L231 Difference]: Finished difference. Result has 197 places, 220 transitions, 2175 flow [2024-06-14 12:19:06,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2175, PETRI_PLACES=197, PETRI_TRANSITIONS=220} [2024-06-14 12:19:06,035 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2024-06-14 12:19:06,035 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 220 transitions, 2175 flow [2024-06-14 12:19:06,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:06,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:06,035 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 12:19:06,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:19:06,035 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:06,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash 194732333, now seen corresponding path program 9 times [2024-06-14 12:19:06,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:06,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881473550] [2024-06-14 12:19:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:06,960 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 12:19:06,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:06,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881473550] [2024-06-14 12:19:06,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881473550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:06,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:06,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:06,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464374455] [2024-06-14 12:19:06,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:06,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:06,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:06,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:07,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:07,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 220 transitions, 2175 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:07,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:07,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:07,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:08,319 INFO L124 PetriNetUnfolderBase]: 3102/4978 cut-off events. [2024-06-14 12:19:08,319 INFO L125 PetriNetUnfolderBase]: For 592516/592519 co-relation queries the response was YES. [2024-06-14 12:19:08,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42972 conditions, 4978 events. 3102/4978 cut-off events. For 592516/592519 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29314 event pairs, 793 based on Foata normal form. 20/4994 useless extension candidates. Maximal degree in co-relation 42877. Up to 4148 conditions per place. [2024-06-14 12:19:08,377 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 175 selfloop transitions, 72 changer transitions 0/260 dead transitions. [2024-06-14 12:19:08,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 260 transitions, 2829 flow [2024-06-14 12:19:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 12:19:08,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 12:19:08,378 INFO L175 Difference]: Start difference. First operand has 197 places, 220 transitions, 2175 flow. Second operand 9 states and 198 transitions. [2024-06-14 12:19:08,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 260 transitions, 2829 flow [2024-06-14 12:19:08,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 260 transitions, 2665 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:08,856 INFO L231 Difference]: Finished difference. Result has 199 places, 221 transitions, 2204 flow [2024-06-14 12:19:08,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2204, PETRI_PLACES=199, PETRI_TRANSITIONS=221} [2024-06-14 12:19:08,857 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 153 predicate places. [2024-06-14 12:19:08,857 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 221 transitions, 2204 flow [2024-06-14 12:19:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:08,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:08,857 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 12:19:08,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:19:08,858 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:08,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:08,858 INFO L85 PathProgramCache]: Analyzing trace with hash 194554703, now seen corresponding path program 10 times [2024-06-14 12:19:08,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250999058] [2024-06-14 12:19:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:08,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:09,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:09,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250999058] [2024-06-14 12:19:09,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250999058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:09,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:09,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115885294] [2024-06-14 12:19:09,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:09,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:09,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 221 transitions, 2204 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:09,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:09,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:09,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:11,163 INFO L124 PetriNetUnfolderBase]: 3160/5076 cut-off events. [2024-06-14 12:19:11,163 INFO L125 PetriNetUnfolderBase]: For 606480/606483 co-relation queries the response was YES. [2024-06-14 12:19:11,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43648 conditions, 5076 events. 3160/5076 cut-off events. For 606480/606483 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30107 event pairs, 779 based on Foata normal form. 16/5088 useless extension candidates. Maximal degree in co-relation 43552. Up to 4136 conditions per place. [2024-06-14 12:19:11,217 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 178 selfloop transitions, 74 changer transitions 0/265 dead transitions. [2024-06-14 12:19:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 265 transitions, 2884 flow [2024-06-14 12:19:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 12:19:11,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49876543209876545 [2024-06-14 12:19:11,219 INFO L175 Difference]: Start difference. First operand has 199 places, 221 transitions, 2204 flow. Second operand 9 states and 202 transitions. [2024-06-14 12:19:11,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 265 transitions, 2884 flow [2024-06-14 12:19:11,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 265 transitions, 2717 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:11,830 INFO L231 Difference]: Finished difference. Result has 201 places, 222 transitions, 2235 flow [2024-06-14 12:19:11,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2235, PETRI_PLACES=201, PETRI_TRANSITIONS=222} [2024-06-14 12:19:11,830 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 155 predicate places. [2024-06-14 12:19:11,831 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 222 transitions, 2235 flow [2024-06-14 12:19:11,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:11,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:11,831 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 12:19:11,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:19:11,831 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 12:19:11,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash 728661176, now seen corresponding path program 1 times [2024-06-14 12:19:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:11,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752446233] [2024-06-14 12:19:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:12,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:12,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752446233] [2024-06-14 12:19:12,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752446233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:12,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:12,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629218549] [2024-06-14 12:19:12,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:12,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:12,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:19:12,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 222 transitions, 2235 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:12,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:12,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:19:12,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:13,714 INFO L124 PetriNetUnfolderBase]: 3000/4890 cut-off events. [2024-06-14 12:19:13,714 INFO L125 PetriNetUnfolderBase]: For 601548/601551 co-relation queries the response was YES. [2024-06-14 12:19:13,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42927 conditions, 4890 events. 3000/4890 cut-off events. For 601548/601551 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29628 event pairs, 843 based on Foata normal form. 4/4854 useless extension candidates. Maximal degree in co-relation 42830. Up to 4379 conditions per place. [2024-06-14 12:19:13,785 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 189 selfloop transitions, 24 changer transitions 0/244 dead transitions. [2024-06-14 12:19:13,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 244 transitions, 2764 flow [2024-06-14 12:19:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 12:19:13,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2024-06-14 12:19:13,787 INFO L175 Difference]: Start difference. First operand has 201 places, 222 transitions, 2235 flow. Second operand 7 states and 149 transitions. [2024-06-14 12:19:13,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 244 transitions, 2764 flow [2024-06-14 12:19:14,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 244 transitions, 2586 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:14,551 INFO L231 Difference]: Finished difference. Result has 201 places, 226 transitions, 2175 flow [2024-06-14 12:19:14,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2175, PETRI_PLACES=201, PETRI_TRANSITIONS=226} [2024-06-14 12:19:14,552 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 155 predicate places. [2024-06-14 12:19:14,552 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 226 transitions, 2175 flow [2024-06-14 12:19:14,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:14,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:14,553 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 12:19:14,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:19:14,553 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 12:19:14,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1346387544, now seen corresponding path program 2 times [2024-06-14 12:19:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:14,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859788302] [2024-06-14 12:19:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859788302] [2024-06-14 12:19:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859788302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:15,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:15,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:15,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715017648] [2024-06-14 12:19:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:15,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:15,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:15,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:19:15,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 226 transitions, 2175 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:15,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:15,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:19:15,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:16,263 INFO L124 PetriNetUnfolderBase]: 3002/4893 cut-off events. [2024-06-14 12:19:16,263 INFO L125 PetriNetUnfolderBase]: For 612404/612407 co-relation queries the response was YES. [2024-06-14 12:19:16,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42636 conditions, 4893 events. 3002/4893 cut-off events. For 612404/612407 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29620 event pairs, 857 based on Foata normal form. 4/4857 useless extension candidates. Maximal degree in co-relation 42538. Up to 4350 conditions per place. [2024-06-14 12:19:16,316 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 178 selfloop transitions, 36 changer transitions 0/245 dead transitions. [2024-06-14 12:19:16,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 245 transitions, 2829 flow [2024-06-14 12:19:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 12:19:16,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2024-06-14 12:19:16,318 INFO L175 Difference]: Start difference. First operand has 201 places, 226 transitions, 2175 flow. Second operand 7 states and 148 transitions. [2024-06-14 12:19:16,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 245 transitions, 2829 flow [2024-06-14 12:19:16,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 245 transitions, 2752 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:16,773 INFO L231 Difference]: Finished difference. Result has 203 places, 229 transitions, 2235 flow [2024-06-14 12:19:16,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2098, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2235, PETRI_PLACES=203, PETRI_TRANSITIONS=229} [2024-06-14 12:19:16,773 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 157 predicate places. [2024-06-14 12:19:16,773 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 229 transitions, 2235 flow [2024-06-14 12:19:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:16,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:16,774 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 12:19:16,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:19:16,774 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 12:19:16,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1357490659, now seen corresponding path program 1 times [2024-06-14 12:19:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:16,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881815628] [2024-06-14 12:19:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:16,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:17,578 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 12:19:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881815628] [2024-06-14 12:19:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881815628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:17,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661104704] [2024-06-14 12:19:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:17,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:17,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:17,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 229 transitions, 2235 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:17,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:17,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:17,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:18,608 INFO L124 PetriNetUnfolderBase]: 3105/5002 cut-off events. [2024-06-14 12:19:18,608 INFO L125 PetriNetUnfolderBase]: For 628089/628092 co-relation queries the response was YES. [2024-06-14 12:19:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43408 conditions, 5002 events. 3105/5002 cut-off events. For 628089/628092 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29902 event pairs, 892 based on Foata normal form. 4/4966 useless extension candidates. Maximal degree in co-relation 43309. Up to 4593 conditions per place. [2024-06-14 12:19:18,665 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 201 selfloop transitions, 30 changer transitions 0/254 dead transitions. [2024-06-14 12:19:18,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 254 transitions, 2827 flow [2024-06-14 12:19:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:19:18,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:19:18,667 INFO L175 Difference]: Start difference. First operand has 203 places, 229 transitions, 2235 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:19:18,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 254 transitions, 2827 flow [2024-06-14 12:19:19,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 254 transitions, 2740 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:19:19,267 INFO L231 Difference]: Finished difference. Result has 207 places, 233 transitions, 2297 flow [2024-06-14 12:19:19,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2297, PETRI_PLACES=207, PETRI_TRANSITIONS=233} [2024-06-14 12:19:19,267 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 161 predicate places. [2024-06-14 12:19:19,267 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 233 transitions, 2297 flow [2024-06-14 12:19:19,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:19,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:19,268 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 12:19:19,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:19:19,268 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 12:19:19,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 736289656, now seen corresponding path program 1 times [2024-06-14 12:19:19,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:19,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801583228] [2024-06-14 12:19:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:19,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:20,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801583228] [2024-06-14 12:19:20,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801583228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:20,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:20,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:20,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142488983] [2024-06-14 12:19:20,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:20,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:20,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:20,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:20,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:20,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:20,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 233 transitions, 2297 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:20,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:20,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:20,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:21,288 INFO L124 PetriNetUnfolderBase]: 3110/5008 cut-off events. [2024-06-14 12:19:21,288 INFO L125 PetriNetUnfolderBase]: For 643690/643690 co-relation queries the response was YES. [2024-06-14 12:19:21,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44186 conditions, 5008 events. 3110/5008 cut-off events. For 643690/643690 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29933 event pairs, 887 based on Foata normal form. 1/4970 useless extension candidates. Maximal degree in co-relation 44086. Up to 4668 conditions per place. [2024-06-14 12:19:21,349 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 209 selfloop transitions, 19 changer transitions 0/251 dead transitions. [2024-06-14 12:19:21,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 251 transitions, 2849 flow [2024-06-14 12:19:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:21,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:19:21,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:19:21,350 INFO L175 Difference]: Start difference. First operand has 207 places, 233 transitions, 2297 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:19:21,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 251 transitions, 2849 flow [2024-06-14 12:19:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 251 transitions, 2728 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:21,791 INFO L231 Difference]: Finished difference. Result has 209 places, 236 transitions, 2284 flow [2024-06-14 12:19:21,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2284, PETRI_PLACES=209, PETRI_TRANSITIONS=236} [2024-06-14 12:19:21,791 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 163 predicate places. [2024-06-14 12:19:21,791 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 236 transitions, 2284 flow [2024-06-14 12:19:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:21,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:21,792 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 12:19:21,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:19:21,792 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 12:19:21,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 736289191, now seen corresponding path program 2 times [2024-06-14 12:19:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:21,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935986396] [2024-06-14 12:19:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:22,877 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 12:19:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935986396] [2024-06-14 12:19:22,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935986396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:22,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228614497] [2024-06-14 12:19:22,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:22,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:22,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:22,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 236 transitions, 2284 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:22,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:22,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:22,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:23,926 INFO L124 PetriNetUnfolderBase]: 3273/5257 cut-off events. [2024-06-14 12:19:23,926 INFO L125 PetriNetUnfolderBase]: For 666929/666932 co-relation queries the response was YES. [2024-06-14 12:19:23,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46358 conditions, 5257 events. 3273/5257 cut-off events. For 666929/666932 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31379 event pairs, 897 based on Foata normal form. 4/5215 useless extension candidates. Maximal degree in co-relation 46257. Up to 4702 conditions per place. [2024-06-14 12:19:23,987 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 222 selfloop transitions, 55 changer transitions 0/300 dead transitions. [2024-06-14 12:19:23,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 300 transitions, 3684 flow [2024-06-14 12:19:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:19:23,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-14 12:19:23,988 INFO L175 Difference]: Start difference. First operand has 209 places, 236 transitions, 2284 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:19:23,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 300 transitions, 3684 flow [2024-06-14 12:19:24,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 300 transitions, 3581 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:24,560 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 2800 flow [2024-06-14 12:19:24,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2800, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-14 12:19:24,560 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 169 predicate places. [2024-06-14 12:19:24,560 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 2800 flow [2024-06-14 12:19:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:24,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:24,561 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 12:19:24,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:19:24,561 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 12:19:24,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash 736276171, now seen corresponding path program 3 times [2024-06-14 12:19:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:24,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288370017] [2024-06-14 12:19:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:25,493 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 12:19:25,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288370017] [2024-06-14 12:19:25,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288370017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:25,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:25,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144953149] [2024-06-14 12:19:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:25,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:25,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:25,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 2800 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:25,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:25,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:25,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:26,495 INFO L124 PetriNetUnfolderBase]: 3277/5263 cut-off events. [2024-06-14 12:19:26,495 INFO L125 PetriNetUnfolderBase]: For 688595/688598 co-relation queries the response was YES. [2024-06-14 12:19:26,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47550 conditions, 5263 events. 3277/5263 cut-off events. For 688595/688598 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31404 event pairs, 897 based on Foata normal form. 4/5221 useless extension candidates. Maximal degree in co-relation 47445. Up to 4709 conditions per place. [2024-06-14 12:19:26,556 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 220 selfloop transitions, 59 changer transitions 0/302 dead transitions. [2024-06-14 12:19:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 302 transitions, 3716 flow [2024-06-14 12:19:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:19:26,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-14 12:19:26,558 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 2800 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:19:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 302 transitions, 3716 flow [2024-06-14 12:19:27,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 3594 flow, removed 60 selfloop flow, removed 1 redundant places. [2024-06-14 12:19:27,234 INFO L231 Difference]: Finished difference. Result has 225 places, 279 transitions, 2984 flow [2024-06-14 12:19:27,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2984, PETRI_PLACES=225, PETRI_TRANSITIONS=279} [2024-06-14 12:19:27,234 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 179 predicate places. [2024-06-14 12:19:27,235 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 279 transitions, 2984 flow [2024-06-14 12:19:27,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:27,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:27,235 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 12:19:27,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:19:27,235 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:27,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1310755693, now seen corresponding path program 11 times [2024-06-14 12:19:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:27,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346157178] [2024-06-14 12:19:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:28,243 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 12:19:28,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:28,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346157178] [2024-06-14 12:19:28,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346157178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:28,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:28,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525966307] [2024-06-14 12:19:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:28,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:28,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 279 transitions, 2984 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:28,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:28,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:28,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:29,828 INFO L124 PetriNetUnfolderBase]: 3432/5499 cut-off events. [2024-06-14 12:19:29,828 INFO L125 PetriNetUnfolderBase]: For 744876/744879 co-relation queries the response was YES. [2024-06-14 12:19:29,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49365 conditions, 5499 events. 3432/5499 cut-off events. For 744876/744879 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32790 event pairs, 802 based on Foata normal form. 22/5507 useless extension candidates. Maximal degree in co-relation 49255. Up to 4562 conditions per place. [2024-06-14 12:19:29,891 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-14 12:19:29,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 315 transitions, 3732 flow [2024-06-14 12:19:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 12:19:29,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47160493827160493 [2024-06-14 12:19:29,893 INFO L175 Difference]: Start difference. First operand has 225 places, 279 transitions, 2984 flow. Second operand 9 states and 191 transitions. [2024-06-14 12:19:29,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 315 transitions, 3732 flow [2024-06-14 12:19:30,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 315 transitions, 3600 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:30,580 INFO L231 Difference]: Finished difference. Result has 229 places, 280 transitions, 3045 flow [2024-06-14 12:19:30,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3045, PETRI_PLACES=229, PETRI_TRANSITIONS=280} [2024-06-14 12:19:30,581 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 183 predicate places. [2024-06-14 12:19:30,581 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 280 transitions, 3045 flow [2024-06-14 12:19:30,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:30,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:30,581 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 12:19:30,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:19:30,582 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:30,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -780076709, now seen corresponding path program 12 times [2024-06-14 12:19:30,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:30,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60608969] [2024-06-14 12:19:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:30,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:31,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:31,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60608969] [2024-06-14 12:19:31,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60608969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:31,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:31,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:31,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330068288] [2024-06-14 12:19:31,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:31,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:31,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:31,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:31,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:31,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 280 transitions, 3045 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:31,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:31,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:31,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:32,913 INFO L124 PetriNetUnfolderBase]: 3507/5623 cut-off events. [2024-06-14 12:19:32,913 INFO L125 PetriNetUnfolderBase]: For 770909/770912 co-relation queries the response was YES. [2024-06-14 12:19:32,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50613 conditions, 5623 events. 3507/5623 cut-off events. For 770909/770912 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33742 event pairs, 812 based on Foata normal form. 22/5632 useless extension candidates. Maximal degree in co-relation 50502. Up to 4687 conditions per place. [2024-06-14 12:19:32,978 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 71 changer transitions 0/316 dead transitions. [2024-06-14 12:19:32,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 316 transitions, 3797 flow [2024-06-14 12:19:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 12:19:32,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-14 12:19:32,980 INFO L175 Difference]: Start difference. First operand has 229 places, 280 transitions, 3045 flow. Second operand 9 states and 190 transitions. [2024-06-14 12:19:32,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 316 transitions, 3797 flow [2024-06-14 12:19:33,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 316 transitions, 3630 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:33,780 INFO L231 Difference]: Finished difference. Result has 231 places, 281 transitions, 3075 flow [2024-06-14 12:19:33,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3075, PETRI_PLACES=231, PETRI_TRANSITIONS=281} [2024-06-14 12:19:33,781 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 185 predicate places. [2024-06-14 12:19:33,781 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 281 transitions, 3075 flow [2024-06-14 12:19:33,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:33,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:33,781 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 12:19:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:19:33,781 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:33,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1532400733, now seen corresponding path program 13 times [2024-06-14 12:19:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:33,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021153243] [2024-06-14 12:19:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:34,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:34,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021153243] [2024-06-14 12:19:34,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021153243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:34,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:34,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006831177] [2024-06-14 12:19:34,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:34,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:34,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 281 transitions, 3075 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:34,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:36,090 INFO L124 PetriNetUnfolderBase]: 3557/5719 cut-off events. [2024-06-14 12:19:36,091 INFO L125 PetriNetUnfolderBase]: For 785194/785197 co-relation queries the response was YES. [2024-06-14 12:19:36,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50963 conditions, 5719 events. 3557/5719 cut-off events. For 785194/785197 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34535 event pairs, 839 based on Foata normal form. 22/5728 useless extension candidates. Maximal degree in co-relation 50851. Up to 4773 conditions per place. [2024-06-14 12:19:36,165 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 223 selfloop transitions, 74 changer transitions 0/316 dead transitions. [2024-06-14 12:19:36,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 316 transitions, 3825 flow [2024-06-14 12:19:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 12:19:36,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641975308641975 [2024-06-14 12:19:36,167 INFO L175 Difference]: Start difference. First operand has 231 places, 281 transitions, 3075 flow. Second operand 9 states and 188 transitions. [2024-06-14 12:19:36,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 316 transitions, 3825 flow [2024-06-14 12:19:36,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 316 transitions, 3654 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:36,871 INFO L231 Difference]: Finished difference. Result has 233 places, 282 transitions, 3109 flow [2024-06-14 12:19:36,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3109, PETRI_PLACES=233, PETRI_TRANSITIONS=282} [2024-06-14 12:19:36,871 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 187 predicate places. [2024-06-14 12:19:36,871 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 282 transitions, 3109 flow [2024-06-14 12:19:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:36,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:36,872 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 12:19:36,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:19:36,872 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:36,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:36,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1304321953, now seen corresponding path program 14 times [2024-06-14 12:19:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036802508] [2024-06-14 12:19:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:36,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:37,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:37,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036802508] [2024-06-14 12:19:37,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036802508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:37,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:37,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:37,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449301643] [2024-06-14 12:19:37,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:37,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:37,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:37,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:37,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:37,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:37,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 282 transitions, 3109 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:37,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:37,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:37,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:39,358 INFO L124 PetriNetUnfolderBase]: 3529/5675 cut-off events. [2024-06-14 12:19:39,359 INFO L125 PetriNetUnfolderBase]: For 764015/764018 co-relation queries the response was YES. [2024-06-14 12:19:39,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49744 conditions, 5675 events. 3529/5675 cut-off events. For 764015/764018 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34228 event pairs, 794 based on Foata normal form. 18/5680 useless extension candidates. Maximal degree in co-relation 49631. Up to 4379 conditions per place. [2024-06-14 12:19:39,427 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 226 selfloop transitions, 75 changer transitions 0/320 dead transitions. [2024-06-14 12:19:39,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 320 transitions, 3833 flow [2024-06-14 12:19:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 12:19:39,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:19:39,429 INFO L175 Difference]: Start difference. First operand has 233 places, 282 transitions, 3109 flow. Second operand 9 states and 192 transitions. [2024-06-14 12:19:39,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 320 transitions, 3833 flow [2024-06-14 12:19:40,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 320 transitions, 3640 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:40,258 INFO L231 Difference]: Finished difference. Result has 235 places, 282 transitions, 3072 flow [2024-06-14 12:19:40,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3072, PETRI_PLACES=235, PETRI_TRANSITIONS=282} [2024-06-14 12:19:40,259 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 189 predicate places. [2024-06-14 12:19:40,259 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 282 transitions, 3072 flow [2024-06-14 12:19:40,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:40,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:40,260 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 12:19:40,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:19:40,260 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 12:19:40,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash 740820938, now seen corresponding path program 3 times [2024-06-14 12:19:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543390614] [2024-06-14 12:19:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:41,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:41,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543390614] [2024-06-14 12:19:41,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543390614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:41,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815262251] [2024-06-14 12:19:41,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:41,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:41,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:41,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:41,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:19:41,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 282 transitions, 3072 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:41,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:41,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:19:41,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:42,193 INFO L124 PetriNetUnfolderBase]: 3354/5448 cut-off events. [2024-06-14 12:19:42,193 INFO L125 PetriNetUnfolderBase]: For 745282/745282 co-relation queries the response was YES. [2024-06-14 12:19:42,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48571 conditions, 5448 events. 3354/5448 cut-off events. For 745282/745282 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33379 event pairs, 896 based on Foata normal form. 1/5389 useless extension candidates. Maximal degree in co-relation 48457. Up to 4844 conditions per place. [2024-06-14 12:19:42,364 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 229 selfloop transitions, 31 changer transitions 0/297 dead transitions. [2024-06-14 12:19:42,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 297 transitions, 3630 flow [2024-06-14 12:19:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 12:19:42,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2024-06-14 12:19:42,366 INFO L175 Difference]: Start difference. First operand has 235 places, 282 transitions, 3072 flow. Second operand 7 states and 146 transitions. [2024-06-14 12:19:42,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 297 transitions, 3630 flow [2024-06-14 12:19:42,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 297 transitions, 3399 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:42,974 INFO L231 Difference]: Finished difference. Result has 234 places, 282 transitions, 2909 flow [2024-06-14 12:19:42,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2909, PETRI_PLACES=234, PETRI_TRANSITIONS=282} [2024-06-14 12:19:42,976 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 188 predicate places. [2024-06-14 12:19:42,976 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 282 transitions, 2909 flow [2024-06-14 12:19:42,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:42,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:42,976 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 12:19:42,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:19:42,976 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 12:19:42,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1938103480, now seen corresponding path program 4 times [2024-06-14 12:19:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:42,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983207708] [2024-06-14 12:19:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:43,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:43,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983207708] [2024-06-14 12:19:43,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983207708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:43,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:43,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:43,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559979354] [2024-06-14 12:19:43,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:43,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:43,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:19:43,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 282 transitions, 2909 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:43,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:43,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:19:43,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:44,931 INFO L124 PetriNetUnfolderBase]: 3359/5455 cut-off events. [2024-06-14 12:19:44,931 INFO L125 PetriNetUnfolderBase]: For 759717/759717 co-relation queries the response was YES. [2024-06-14 12:19:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 5455 events. 3359/5455 cut-off events. For 759717/759717 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33406 event pairs, 894 based on Foata normal form. 1/5396 useless extension candidates. Maximal degree in co-relation 48132. Up to 4833 conditions per place. [2024-06-14 12:19:44,990 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 216 selfloop transitions, 44 changer transitions 0/297 dead transitions. [2024-06-14 12:19:44,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 297 transitions, 3509 flow [2024-06-14 12:19:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:19:44,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:19:44,991 INFO L175 Difference]: Start difference. First operand has 234 places, 282 transitions, 2909 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:19:44,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 297 transitions, 3509 flow [2024-06-14 12:19:45,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 297 transitions, 3362 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:45,630 INFO L231 Difference]: Finished difference. Result has 234 places, 285 transitions, 2912 flow [2024-06-14 12:19:45,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2912, PETRI_PLACES=234, PETRI_TRANSITIONS=285} [2024-06-14 12:19:45,630 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 188 predicate places. [2024-06-14 12:19:45,630 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 285 transitions, 2912 flow [2024-06-14 12:19:45,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:45,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:45,631 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 12:19:45,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:19:45,631 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 12:19:45,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash 595868944, now seen corresponding path program 5 times [2024-06-14 12:19:45,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:45,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160227391] [2024-06-14 12:19:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:45,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:46,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160227391] [2024-06-14 12:19:46,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160227391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:46,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:46,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:46,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689655433] [2024-06-14 12:19:46,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:46,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:46,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:46,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:46,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:19:46,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 285 transitions, 2912 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:46,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:46,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:19:46,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:47,771 INFO L124 PetriNetUnfolderBase]: 3364/5470 cut-off events. [2024-06-14 12:19:47,771 INFO L125 PetriNetUnfolderBase]: For 778774/778777 co-relation queries the response was YES. [2024-06-14 12:19:47,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48561 conditions, 5470 events. 3364/5470 cut-off events. For 778774/778777 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33613 event pairs, 918 based on Foata normal form. 3/5412 useless extension candidates. Maximal degree in co-relation 48445. Up to 4757 conditions per place. [2024-06-14 12:19:47,838 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 180 selfloop transitions, 81 changer transitions 0/298 dead transitions. [2024-06-14 12:19:47,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 298 transitions, 3666 flow [2024-06-14 12:19:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:19:47,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:19:47,839 INFO L175 Difference]: Start difference. First operand has 234 places, 285 transitions, 2912 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:19:47,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 298 transitions, 3666 flow [2024-06-14 12:19:48,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 298 transitions, 3548 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:48,477 INFO L231 Difference]: Finished difference. Result has 237 places, 288 transitions, 3018 flow [2024-06-14 12:19:48,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3018, PETRI_PLACES=237, PETRI_TRANSITIONS=288} [2024-06-14 12:19:48,478 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 191 predicate places. [2024-06-14 12:19:48,478 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 288 transitions, 3018 flow [2024-06-14 12:19:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:48,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:48,478 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 12:19:48,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:19:48,478 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 12:19:48,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash 663891128, now seen corresponding path program 6 times [2024-06-14 12:19:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:48,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927174790] [2024-06-14 12:19:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927174790] [2024-06-14 12:19:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927174790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:49,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:49,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:49,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535421844] [2024-06-14 12:19:49,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:49,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:49,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:49,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:49,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:19:49,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 288 transitions, 3018 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:49,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:49,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:19:49,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:50,383 INFO L124 PetriNetUnfolderBase]: 3356/5460 cut-off events. [2024-06-14 12:19:50,384 INFO L125 PetriNetUnfolderBase]: For 794908/794911 co-relation queries the response was YES. [2024-06-14 12:19:50,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48640 conditions, 5460 events. 3356/5460 cut-off events. For 794908/794911 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33514 event pairs, 919 based on Foata normal form. 4/5403 useless extension candidates. Maximal degree in co-relation 48523. Up to 4749 conditions per place. [2024-06-14 12:19:50,445 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 72 changer transitions 0/297 dead transitions. [2024-06-14 12:19:50,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 297 transitions, 3560 flow [2024-06-14 12:19:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:19:50,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-14 12:19:50,447 INFO L175 Difference]: Start difference. First operand has 237 places, 288 transitions, 3018 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:19:50,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 297 transitions, 3560 flow [2024-06-14 12:19:51,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 297 transitions, 3342 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:51,116 INFO L231 Difference]: Finished difference. Result has 239 places, 288 transitions, 2952 flow [2024-06-14 12:19:51,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2952, PETRI_PLACES=239, PETRI_TRANSITIONS=288} [2024-06-14 12:19:51,117 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 193 predicate places. [2024-06-14 12:19:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 288 transitions, 2952 flow [2024-06-14 12:19:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:51,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:19:51,117 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:51,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1341328903, now seen corresponding path program 1 times [2024-06-14 12:19:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156537371] [2024-06-14 12:19:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:52,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:52,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156537371] [2024-06-14 12:19:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156537371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:52,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:19:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112050234] [2024-06-14 12:19:52,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:52,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:19:52,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:19:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:19:52,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:52,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 288 transitions, 2952 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:52,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:52,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:52,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:53,900 INFO L124 PetriNetUnfolderBase]: 3541/5665 cut-off events. [2024-06-14 12:19:53,900 INFO L125 PetriNetUnfolderBase]: For 818621/818621 co-relation queries the response was YES. [2024-06-14 12:19:53,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49934 conditions, 5665 events. 3541/5665 cut-off events. For 818621/818621 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 34015 event pairs, 843 based on Foata normal form. 4/5644 useless extension candidates. Maximal degree in co-relation 49816. Up to 4852 conditions per place. [2024-06-14 12:19:53,969 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 228 selfloop transitions, 80 changer transitions 0/327 dead transitions. [2024-06-14 12:19:53,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 3738 flow [2024-06-14 12:19:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:19:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:19:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:19:53,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:19:53,970 INFO L175 Difference]: Start difference. First operand has 239 places, 288 transitions, 2952 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:19:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 3738 flow [2024-06-14 12:19:54,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 3562 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:54,642 INFO L231 Difference]: Finished difference. Result has 243 places, 293 transitions, 3033 flow [2024-06-14 12:19:54,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3033, PETRI_PLACES=243, PETRI_TRANSITIONS=293} [2024-06-14 12:19:54,642 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 197 predicate places. [2024-06-14 12:19:54,643 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 293 transitions, 3033 flow [2024-06-14 12:19:54,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:54,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:54,643 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 12:19:54,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:19:54,643 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:54,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:54,644 INFO L85 PathProgramCache]: Analyzing trace with hash -646541433, now seen corresponding path program 2 times [2024-06-14 12:19:54,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:54,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502183280] [2024-06-14 12:19:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:55,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502183280] [2024-06-14 12:19:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502183280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:55,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:55,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:19:55,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946378918] [2024-06-14 12:19:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:19:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:19:55,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:19:55,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:55,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 293 transitions, 3033 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:55,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:55,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:55,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:57,302 INFO L124 PetriNetUnfolderBase]: 3558/5694 cut-off events. [2024-06-14 12:19:57,303 INFO L125 PetriNetUnfolderBase]: For 843028/843028 co-relation queries the response was YES. [2024-06-14 12:19:57,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51128 conditions, 5694 events. 3558/5694 cut-off events. For 843028/843028 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34179 event pairs, 843 based on Foata normal form. 4/5673 useless extension candidates. Maximal degree in co-relation 51008. Up to 4879 conditions per place. [2024-06-14 12:19:57,378 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 229 selfloop transitions, 84 changer transitions 0/332 dead transitions. [2024-06-14 12:19:57,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 332 transitions, 3845 flow [2024-06-14 12:19:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:19:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:19:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:19:57,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:19:57,379 INFO L175 Difference]: Start difference. First operand has 243 places, 293 transitions, 3033 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:19:57,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 332 transitions, 3845 flow [2024-06-14 12:19:58,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 332 transitions, 3628 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:58,318 INFO L231 Difference]: Finished difference. Result has 247 places, 298 transitions, 3091 flow [2024-06-14 12:19:58,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3091, PETRI_PLACES=247, PETRI_TRANSITIONS=298} [2024-06-14 12:19:58,319 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 201 predicate places. [2024-06-14 12:19:58,319 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 298 transitions, 3091 flow [2024-06-14 12:19:58,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:58,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:58,319 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 12:19:58,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:19:58,319 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:58,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2020265321, now seen corresponding path program 3 times [2024-06-14 12:19:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:58,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327748843] [2024-06-14 12:19:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:59,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327748843] [2024-06-14 12:19:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327748843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:59,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:59,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:19:59,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166791098] [2024-06-14 12:19:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:59,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:19:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:59,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:19:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:19:59,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:19:59,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 298 transitions, 3091 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:59,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:59,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:19:59,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:01,007 INFO L124 PetriNetUnfolderBase]: 3586/5746 cut-off events. [2024-06-14 12:20:01,007 INFO L125 PetriNetUnfolderBase]: For 866646/866646 co-relation queries the response was YES. [2024-06-14 12:20:01,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52108 conditions, 5746 events. 3586/5746 cut-off events. For 866646/866646 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 34634 event pairs, 843 based on Foata normal form. 4/5728 useless extension candidates. Maximal degree in co-relation 51986. Up to 4913 conditions per place. [2024-06-14 12:20:01,081 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 226 selfloop transitions, 96 changer transitions 0/341 dead transitions. [2024-06-14 12:20:01,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 341 transitions, 3975 flow [2024-06-14 12:20:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:20:01,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:20:01,082 INFO L175 Difference]: Start difference. First operand has 247 places, 298 transitions, 3091 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:20:01,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 341 transitions, 3975 flow [2024-06-14 12:20:02,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 341 transitions, 3732 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:02,027 INFO L231 Difference]: Finished difference. Result has 251 places, 309 transitions, 3225 flow [2024-06-14 12:20:02,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3225, PETRI_PLACES=251, PETRI_TRANSITIONS=309} [2024-06-14 12:20:02,027 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 205 predicate places. [2024-06-14 12:20:02,027 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 309 transitions, 3225 flow [2024-06-14 12:20:02,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:02,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:02,028 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 12:20:02,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:20:02,028 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:02,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -989384825, now seen corresponding path program 4 times [2024-06-14 12:20:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:02,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879301076] [2024-06-14 12:20:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:03,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:03,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879301076] [2024-06-14 12:20:03,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879301076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:03,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:03,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:20:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419926432] [2024-06-14 12:20:03,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:03,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:20:03,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:03,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:20:03,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:20:03,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:03,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 309 transitions, 3225 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:03,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:03,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:03,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:05,260 INFO L124 PetriNetUnfolderBase]: 3619/5815 cut-off events. [2024-06-14 12:20:05,261 INFO L125 PetriNetUnfolderBase]: For 879950/879950 co-relation queries the response was YES. [2024-06-14 12:20:05,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52622 conditions, 5815 events. 3619/5815 cut-off events. For 879950/879950 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35264 event pairs, 668 based on Foata normal form. 4/5797 useless extension candidates. Maximal degree in co-relation 52498. Up to 4761 conditions per place. [2024-06-14 12:20:05,327 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 226 selfloop transitions, 107 changer transitions 0/352 dead transitions. [2024-06-14 12:20:05,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 352 transitions, 4423 flow [2024-06-14 12:20:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 12:20:05,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-14 12:20:05,329 INFO L175 Difference]: Start difference. First operand has 251 places, 309 transitions, 3225 flow. Second operand 10 states and 213 transitions. [2024-06-14 12:20:05,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 352 transitions, 4423 flow [2024-06-14 12:20:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 352 transitions, 4200 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:06,208 INFO L231 Difference]: Finished difference. Result has 257 places, 314 transitions, 3404 flow [2024-06-14 12:20:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3404, PETRI_PLACES=257, PETRI_TRANSITIONS=314} [2024-06-14 12:20:06,209 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 211 predicate places. [2024-06-14 12:20:06,209 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 314 transitions, 3404 flow [2024-06-14 12:20:06,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:06,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:06,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:20:06,209 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:06,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1284960215, now seen corresponding path program 5 times [2024-06-14 12:20:06,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:06,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78524073] [2024-06-14 12:20:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:07,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:07,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78524073] [2024-06-14 12:20:07,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78524073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:07,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:20:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676492414] [2024-06-14 12:20:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:20:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:20:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:20:07,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:07,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 314 transitions, 3404 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:07,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:07,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:07,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:09,290 INFO L124 PetriNetUnfolderBase]: 3611/5802 cut-off events. [2024-06-14 12:20:09,290 INFO L125 PetriNetUnfolderBase]: For 889553/889553 co-relation queries the response was YES. [2024-06-14 12:20:09,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51941 conditions, 5802 events. 3611/5802 cut-off events. For 889553/889553 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 35191 event pairs, 850 based on Foata normal form. 4/5783 useless extension candidates. Maximal degree in co-relation 51815. Up to 4960 conditions per place. [2024-06-14 12:20:09,373 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 234 selfloop transitions, 94 changer transitions 0/347 dead transitions. [2024-06-14 12:20:09,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 347 transitions, 4155 flow [2024-06-14 12:20:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:20:09,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:20:09,375 INFO L175 Difference]: Start difference. First operand has 257 places, 314 transitions, 3404 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:20:09,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 347 transitions, 4155 flow [2024-06-14 12:20:10,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 347 transitions, 3867 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:10,318 INFO L231 Difference]: Finished difference. Result has 261 places, 315 transitions, 3334 flow [2024-06-14 12:20:10,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3334, PETRI_PLACES=261, PETRI_TRANSITIONS=315} [2024-06-14 12:20:10,318 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 215 predicate places. [2024-06-14 12:20:10,319 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 315 transitions, 3334 flow [2024-06-14 12:20:10,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:10,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:10,319 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 12:20:10,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:20:10,319 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 12:20:10,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 664333033, now seen corresponding path program 4 times [2024-06-14 12:20:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:10,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215483392] [2024-06-14 12:20:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:11,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:11,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215483392] [2024-06-14 12:20:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215483392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:11,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:11,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733427225] [2024-06-14 12:20:11,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:11,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:11,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:11,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 315 transitions, 3334 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:11,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:11,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:11,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:12,492 INFO L124 PetriNetUnfolderBase]: 3551/5749 cut-off events. [2024-06-14 12:20:12,492 INFO L125 PetriNetUnfolderBase]: For 907185/907188 co-relation queries the response was YES. [2024-06-14 12:20:12,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51755 conditions, 5749 events. 3551/5749 cut-off events. For 907185/907188 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35380 event pairs, 845 based on Foata normal form. 4/5692 useless extension candidates. Maximal degree in co-relation 51627. Up to 5009 conditions per place. [2024-06-14 12:20:12,563 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 209 selfloop transitions, 108 changer transitions 0/340 dead transitions. [2024-06-14 12:20:12,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 340 transitions, 4640 flow [2024-06-14 12:20:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:20:12,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-14 12:20:12,565 INFO L175 Difference]: Start difference. First operand has 261 places, 315 transitions, 3334 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:20:12,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 340 transitions, 4640 flow [2024-06-14 12:20:13,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 340 transitions, 4425 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:13,534 INFO L231 Difference]: Finished difference. Result has 263 places, 326 transitions, 3604 flow [2024-06-14 12:20:13,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3604, PETRI_PLACES=263, PETRI_TRANSITIONS=326} [2024-06-14 12:20:13,534 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 217 predicate places. [2024-06-14 12:20:13,534 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 326 transitions, 3604 flow [2024-06-14 12:20:13,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:13,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:13,535 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 12:20:13,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:20:13,536 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 12:20:13,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -416583570, now seen corresponding path program 2 times [2024-06-14 12:20:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:13,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709987552] [2024-06-14 12:20:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:14,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:14,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709987552] [2024-06-14 12:20:14,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709987552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:14,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:14,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:14,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935624413] [2024-06-14 12:20:14,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:14,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:14,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:14,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:14,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 326 transitions, 3604 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:14,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:14,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:14,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:15,874 INFO L124 PetriNetUnfolderBase]: 3564/5768 cut-off events. [2024-06-14 12:20:15,874 INFO L125 PetriNetUnfolderBase]: For 934575/934581 co-relation queries the response was YES. [2024-06-14 12:20:15,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52804 conditions, 5768 events. 3564/5768 cut-off events. For 934575/934581 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35445 event pairs, 809 based on Foata normal form. 5/5719 useless extension candidates. Maximal degree in co-relation 52674. Up to 5323 conditions per place. [2024-06-14 12:20:15,951 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 283 selfloop transitions, 43 changer transitions 0/349 dead transitions. [2024-06-14 12:20:15,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 349 transitions, 4868 flow [2024-06-14 12:20:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:20:15,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 12:20:15,953 INFO L175 Difference]: Start difference. First operand has 263 places, 326 transitions, 3604 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:20:15,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 349 transitions, 4868 flow [2024-06-14 12:20:17,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 4654 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:17,023 INFO L231 Difference]: Finished difference. Result has 269 places, 337 transitions, 3759 flow [2024-06-14 12:20:17,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3759, PETRI_PLACES=269, PETRI_TRANSITIONS=337} [2024-06-14 12:20:17,024 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 223 predicate places. [2024-06-14 12:20:17,024 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 337 transitions, 3759 flow [2024-06-14 12:20:17,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:17,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:17,024 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 12:20:17,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:20:17,025 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 12:20:17,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:17,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1109422396, now seen corresponding path program 3 times [2024-06-14 12:20:17,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:17,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716336018] [2024-06-14 12:20:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:17,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:18,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716336018] [2024-06-14 12:20:18,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716336018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:18,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:18,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364505882] [2024-06-14 12:20:18,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:18,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:18,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:18,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:18,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:18,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 337 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:18,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:18,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:18,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:19,417 INFO L124 PetriNetUnfolderBase]: 3561/5774 cut-off events. [2024-06-14 12:20:19,418 INFO L125 PetriNetUnfolderBase]: For 951534/951540 co-relation queries the response was YES. [2024-06-14 12:20:19,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52728 conditions, 5774 events. 3561/5774 cut-off events. For 951534/951540 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35622 event pairs, 809 based on Foata normal form. 5/5725 useless extension candidates. Maximal degree in co-relation 52595. Up to 5320 conditions per place. [2024-06-14 12:20:19,503 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 277 selfloop transitions, 48 changer transitions 0/348 dead transitions. [2024-06-14 12:20:19,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 348 transitions, 4605 flow [2024-06-14 12:20:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:20:19,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:20:19,508 INFO L175 Difference]: Start difference. First operand has 269 places, 337 transitions, 3759 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:20:19,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 348 transitions, 4605 flow [2024-06-14 12:20:20,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 348 transitions, 4432 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:20,838 INFO L231 Difference]: Finished difference. Result has 275 places, 337 transitions, 3688 flow [2024-06-14 12:20:20,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3688, PETRI_PLACES=275, PETRI_TRANSITIONS=337} [2024-06-14 12:20:20,838 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 229 predicate places. [2024-06-14 12:20:20,838 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 337 transitions, 3688 flow [2024-06-14 12:20:20,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:20,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:20,839 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 12:20:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:20:20,839 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 12:20:20,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:20,839 INFO L85 PathProgramCache]: Analyzing trace with hash 663887563, now seen corresponding path program 5 times [2024-06-14 12:20:20,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:20,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825748624] [2024-06-14 12:20:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:21,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:21,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825748624] [2024-06-14 12:20:21,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825748624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:21,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:21,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139532024] [2024-06-14 12:20:21,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:21,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:21,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 337 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:21,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:21,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:21,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:23,150 INFO L124 PetriNetUnfolderBase]: 3603/5835 cut-off events. [2024-06-14 12:20:23,151 INFO L125 PetriNetUnfolderBase]: For 990654/990657 co-relation queries the response was YES. [2024-06-14 12:20:23,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53841 conditions, 5835 events. 3603/5835 cut-off events. For 990654/990657 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35974 event pairs, 845 based on Foata normal form. 4/5778 useless extension candidates. Maximal degree in co-relation 53706. Up to 5063 conditions per place. [2024-06-14 12:20:23,234 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 230 selfloop transitions, 111 changer transitions 0/364 dead transitions. [2024-06-14 12:20:23,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 364 transitions, 5262 flow [2024-06-14 12:20:23,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:20:23,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:20:23,236 INFO L175 Difference]: Start difference. First operand has 275 places, 337 transitions, 3688 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:20:23,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 364 transitions, 5262 flow [2024-06-14 12:20:24,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 364 transitions, 5166 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:24,323 INFO L231 Difference]: Finished difference. Result has 278 places, 349 transitions, 4144 flow [2024-06-14 12:20:24,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4144, PETRI_PLACES=278, PETRI_TRANSITIONS=349} [2024-06-14 12:20:24,323 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 232 predicate places. [2024-06-14 12:20:24,324 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 349 transitions, 4144 flow [2024-06-14 12:20:24,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:24,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:24,324 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 12:20:24,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:20:24,324 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 12:20:24,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash -417016485, now seen corresponding path program 6 times [2024-06-14 12:20:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:24,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33597652] [2024-06-14 12:20:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:24,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:25,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:25,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33597652] [2024-06-14 12:20:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33597652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:25,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:25,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644699285] [2024-06-14 12:20:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:25,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:25,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:25,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 349 transitions, 4144 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:25,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:25,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:25,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:26,813 INFO L124 PetriNetUnfolderBase]: 3599/5823 cut-off events. [2024-06-14 12:20:26,813 INFO L125 PetriNetUnfolderBase]: For 1008817/1008820 co-relation queries the response was YES. [2024-06-14 12:20:26,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54541 conditions, 5823 events. 3599/5823 cut-off events. For 1008817/1008820 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35864 event pairs, 845 based on Foata normal form. 4/5766 useless extension candidates. Maximal degree in co-relation 54403. Up to 5061 conditions per place. [2024-06-14 12:20:26,902 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 235 selfloop transitions, 106 changer transitions 0/364 dead transitions. [2024-06-14 12:20:26,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 364 transitions, 5464 flow [2024-06-14 12:20:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:20:26,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:20:26,903 INFO L175 Difference]: Start difference. First operand has 278 places, 349 transitions, 4144 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:20:26,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 364 transitions, 5464 flow [2024-06-14 12:20:28,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 364 transitions, 5188 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:28,173 INFO L231 Difference]: Finished difference. Result has 283 places, 349 transitions, 4092 flow [2024-06-14 12:20:28,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4092, PETRI_PLACES=283, PETRI_TRANSITIONS=349} [2024-06-14 12:20:28,174 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 237 predicate places. [2024-06-14 12:20:28,174 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 349 transitions, 4092 flow [2024-06-14 12:20:28,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:28,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:28,175 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 12:20:28,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:20:28,175 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 12:20:28,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash 590164944, now seen corresponding path program 4 times [2024-06-14 12:20:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:28,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624779440] [2024-06-14 12:20:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:28,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:29,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:29,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624779440] [2024-06-14 12:20:29,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624779440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:29,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:29,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:29,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855643075] [2024-06-14 12:20:29,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:29,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:29,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:29,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:29,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 349 transitions, 4092 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:29,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:29,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:29,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:30,464 INFO L124 PetriNetUnfolderBase]: 3596/5820 cut-off events. [2024-06-14 12:20:30,464 INFO L125 PetriNetUnfolderBase]: For 1019940/1019946 co-relation queries the response was YES. [2024-06-14 12:20:30,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54226 conditions, 5820 events. 3596/5820 cut-off events. For 1019940/1019946 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35801 event pairs, 809 based on Foata normal form. 5/5771 useless extension candidates. Maximal degree in co-relation 54087. Up to 5370 conditions per place. [2024-06-14 12:20:30,547 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 295 selfloop transitions, 42 changer transitions 0/360 dead transitions. [2024-06-14 12:20:30,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 360 transitions, 4798 flow [2024-06-14 12:20:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:20:30,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:20:30,548 INFO L175 Difference]: Start difference. First operand has 283 places, 349 transitions, 4092 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:20:30,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 360 transitions, 4798 flow [2024-06-14 12:20:31,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 360 transitions, 4500 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:31,582 INFO L231 Difference]: Finished difference. Result has 283 places, 350 transitions, 3892 flow [2024-06-14 12:20:31,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3892, PETRI_PLACES=283, PETRI_TRANSITIONS=350} [2024-06-14 12:20:31,583 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 237 predicate places. [2024-06-14 12:20:31,583 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 350 transitions, 3892 flow [2024-06-14 12:20:31,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:31,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:31,583 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 12:20:31,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:20:31,584 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 12:20:31,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash -742862263, now seen corresponding path program 7 times [2024-06-14 12:20:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:31,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329170117] [2024-06-14 12:20:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:31,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:32,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:32,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329170117] [2024-06-14 12:20:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329170117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:32,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:32,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:32,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568288608] [2024-06-14 12:20:32,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:32,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:32,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:32,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:32,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 350 transitions, 3892 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:32,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:32,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:32,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:33,856 INFO L124 PetriNetUnfolderBase]: 3753/6067 cut-off events. [2024-06-14 12:20:33,856 INFO L125 PetriNetUnfolderBase]: For 1053633/1053636 co-relation queries the response was YES. [2024-06-14 12:20:33,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56024 conditions, 6067 events. 3753/6067 cut-off events. For 1053633/1053636 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37579 event pairs, 819 based on Foata normal form. 4/6019 useless extension candidates. Maximal degree in co-relation 55886. Up to 5351 conditions per place. [2024-06-14 12:20:33,944 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 315 selfloop transitions, 94 changer transitions 0/432 dead transitions. [2024-06-14 12:20:33,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 432 transitions, 5824 flow [2024-06-14 12:20:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:20:33,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:20:33,945 INFO L175 Difference]: Start difference. First operand has 283 places, 350 transitions, 3892 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:20:33,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 432 transitions, 5824 flow [2024-06-14 12:20:35,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 432 transitions, 5746 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:35,155 INFO L231 Difference]: Finished difference. Result has 290 places, 396 transitions, 4879 flow [2024-06-14 12:20:35,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4879, PETRI_PLACES=290, PETRI_TRANSITIONS=396} [2024-06-14 12:20:35,155 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 244 predicate places. [2024-06-14 12:20:35,155 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 396 transitions, 4879 flow [2024-06-14 12:20:35,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:35,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:35,156 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 12:20:35,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:20:35,156 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 12:20:35,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2076791477, now seen corresponding path program 8 times [2024-06-14 12:20:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:35,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968462557] [2024-06-14 12:20:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:35,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968462557] [2024-06-14 12:20:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968462557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:36,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:36,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793822904] [2024-06-14 12:20:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:36,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:36,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 396 transitions, 4879 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:36,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:36,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:36,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:37,463 INFO L124 PetriNetUnfolderBase]: 3755/6070 cut-off events. [2024-06-14 12:20:37,463 INFO L125 PetriNetUnfolderBase]: For 1077567/1077570 co-relation queries the response was YES. [2024-06-14 12:20:37,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57214 conditions, 6070 events. 3755/6070 cut-off events. For 1077567/1077570 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37576 event pairs, 819 based on Foata normal form. 4/6022 useless extension candidates. Maximal degree in co-relation 57072. Up to 5355 conditions per place. [2024-06-14 12:20:37,549 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 313 selfloop transitions, 99 changer transitions 0/435 dead transitions. [2024-06-14 12:20:37,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 435 transitions, 6175 flow [2024-06-14 12:20:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 12:20:37,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4469135802469136 [2024-06-14 12:20:37,556 INFO L175 Difference]: Start difference. First operand has 290 places, 396 transitions, 4879 flow. Second operand 9 states and 181 transitions. [2024-06-14 12:20:37,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 435 transitions, 6175 flow [2024-06-14 12:20:38,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 435 transitions, 5830 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:38,831 INFO L231 Difference]: Finished difference. Result has 295 places, 406 transitions, 5008 flow [2024-06-14 12:20:38,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5008, PETRI_PLACES=295, PETRI_TRANSITIONS=406} [2024-06-14 12:20:38,832 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 249 predicate places. [2024-06-14 12:20:38,832 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 406 transitions, 5008 flow [2024-06-14 12:20:38,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:38,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:38,832 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 12:20:38,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:20:38,832 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 12:20:38,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1816103886, now seen corresponding path program 1 times [2024-06-14 12:20:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531701457] [2024-06-14 12:20:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:39,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:39,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531701457] [2024-06-14 12:20:39,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531701457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:39,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:39,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462733252] [2024-06-14 12:20:39,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:39,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:39,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:39,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:20:39,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 406 transitions, 5008 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:39,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:39,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:20:39,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:41,105 INFO L124 PetriNetUnfolderBase]: 3727/6088 cut-off events. [2024-06-14 12:20:41,107 INFO L125 PetriNetUnfolderBase]: For 1107194/1107194 co-relation queries the response was YES. [2024-06-14 12:20:41,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57450 conditions, 6088 events. 3727/6088 cut-off events. For 1107194/1107194 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37948 event pairs, 842 based on Foata normal form. 2/6087 useless extension candidates. Maximal degree in co-relation 57306. Up to 5467 conditions per place. [2024-06-14 12:20:41,189 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 373 selfloop transitions, 18 changer transitions 0/429 dead transitions. [2024-06-14 12:20:41,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 429 transitions, 5908 flow [2024-06-14 12:20:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:20:41,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-14 12:20:41,191 INFO L175 Difference]: Start difference. First operand has 295 places, 406 transitions, 5008 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:20:41,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 429 transitions, 5908 flow [2024-06-14 12:20:42,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 429 transitions, 5728 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:42,556 INFO L231 Difference]: Finished difference. Result has 298 places, 409 transitions, 4934 flow [2024-06-14 12:20:42,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4934, PETRI_PLACES=298, PETRI_TRANSITIONS=409} [2024-06-14 12:20:42,556 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 252 predicate places. [2024-06-14 12:20:42,557 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 409 transitions, 4934 flow [2024-06-14 12:20:42,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:42,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:42,557 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 12:20:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:20:42,557 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 12:20:42,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:42,557 INFO L85 PathProgramCache]: Analyzing trace with hash 339174560, now seen corresponding path program 2 times [2024-06-14 12:20:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:42,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839241861] [2024-06-14 12:20:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:43,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:43,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839241861] [2024-06-14 12:20:43,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839241861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:43,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:43,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:43,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914834692] [2024-06-14 12:20:43,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:43,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:43,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:43,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:43,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:20:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 409 transitions, 4934 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:43,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:20:43,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:44,757 INFO L124 PetriNetUnfolderBase]: 3737/6104 cut-off events. [2024-06-14 12:20:44,757 INFO L125 PetriNetUnfolderBase]: For 1129263/1129263 co-relation queries the response was YES. [2024-06-14 12:20:44,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57982 conditions, 6104 events. 3737/6104 cut-off events. For 1129263/1129263 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38065 event pairs, 842 based on Foata normal form. 2/6103 useless extension candidates. Maximal degree in co-relation 57837. Up to 5472 conditions per place. [2024-06-14 12:20:44,842 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 369 selfloop transitions, 23 changer transitions 0/430 dead transitions. [2024-06-14 12:20:44,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 430 transitions, 5836 flow [2024-06-14 12:20:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:20:44,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-14 12:20:44,843 INFO L175 Difference]: Start difference. First operand has 298 places, 409 transitions, 4934 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:20:44,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 430 transitions, 5836 flow [2024-06-14 12:20:46,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 430 transitions, 5752 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:46,303 INFO L231 Difference]: Finished difference. Result has 300 places, 412 transitions, 4972 flow [2024-06-14 12:20:46,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4972, PETRI_PLACES=300, PETRI_TRANSITIONS=412} [2024-06-14 12:20:46,304 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 254 predicate places. [2024-06-14 12:20:46,304 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 412 transitions, 4972 flow [2024-06-14 12:20:46,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:46,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:46,304 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 12:20:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:20:46,304 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 12:20:46,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1932547443, now seen corresponding path program 1 times [2024-06-14 12:20:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022410051] [2024-06-14 12:20:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:47,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022410051] [2024-06-14 12:20:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022410051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:47,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097348203] [2024-06-14 12:20:47,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:47,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:47,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:47,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 412 transitions, 4972 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:47,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:47,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:47,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:48,713 INFO L124 PetriNetUnfolderBase]: 3833/6202 cut-off events. [2024-06-14 12:20:48,713 INFO L125 PetriNetUnfolderBase]: For 1145506/1145506 co-relation queries the response was YES. [2024-06-14 12:20:48,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59142 conditions, 6202 events. 3833/6202 cut-off events. For 1145506/1145506 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38257 event pairs, 869 based on Foata normal form. 1/6200 useless extension candidates. Maximal degree in co-relation 58996. Up to 5776 conditions per place. [2024-06-14 12:20:48,792 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 402 selfloop transitions, 18 changer transitions 0/431 dead transitions. [2024-06-14 12:20:48,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 431 transitions, 5922 flow [2024-06-14 12:20:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:20:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:20:48,794 INFO L175 Difference]: Start difference. First operand has 300 places, 412 transitions, 4972 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:20:48,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 431 transitions, 5922 flow [2024-06-14 12:20:50,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 431 transitions, 5822 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:50,502 INFO L231 Difference]: Finished difference. Result has 302 places, 415 transitions, 4984 flow [2024-06-14 12:20:50,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4984, PETRI_PLACES=302, PETRI_TRANSITIONS=415} [2024-06-14 12:20:50,503 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 256 predicate places. [2024-06-14 12:20:50,503 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 415 transitions, 4984 flow [2024-06-14 12:20:50,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:50,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:50,503 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 12:20:50,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:20:50,503 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 12:20:50,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1938111633, now seen corresponding path program 2 times [2024-06-14 12:20:50,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:50,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067587724] [2024-06-14 12:20:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:50,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:51,408 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 12:20:51,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:51,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067587724] [2024-06-14 12:20:51,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067587724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:51,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:51,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:51,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417662658] [2024-06-14 12:20:51,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:51,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:20:51,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 415 transitions, 4984 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:51,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:51,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:20:51,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:52,935 INFO L124 PetriNetUnfolderBase]: 3846/6220 cut-off events. [2024-06-14 12:20:52,935 INFO L125 PetriNetUnfolderBase]: For 1172151/1172151 co-relation queries the response was YES. [2024-06-14 12:20:52,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59854 conditions, 6220 events. 3846/6220 cut-off events. For 1172151/1172151 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 38354 event pairs, 869 based on Foata normal form. 1/6218 useless extension candidates. Maximal degree in co-relation 59707. Up to 5778 conditions per place. [2024-06-14 12:20:53,021 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 394 selfloop transitions, 30 changer transitions 0/435 dead transitions. [2024-06-14 12:20:53,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 435 transitions, 6198 flow [2024-06-14 12:20:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:20:53,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:20:53,023 INFO L175 Difference]: Start difference. First operand has 302 places, 415 transitions, 4984 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:20:53,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 435 transitions, 6198 flow [2024-06-14 12:20:54,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 435 transitions, 6108 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:54,901 INFO L231 Difference]: Finished difference. Result has 304 places, 421 transitions, 5106 flow [2024-06-14 12:20:54,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5106, PETRI_PLACES=304, PETRI_TRANSITIONS=421} [2024-06-14 12:20:54,902 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 258 predicate places. [2024-06-14 12:20:54,902 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 421 transitions, 5106 flow [2024-06-14 12:20:54,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:54,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:54,902 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 12:20:54,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:20:54,902 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 12:20:54,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2017273382, now seen corresponding path program 3 times [2024-06-14 12:20:54,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805619556] [2024-06-14 12:20:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:55,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805619556] [2024-06-14 12:20:55,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805619556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:55,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:55,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379894845] [2024-06-14 12:20:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:55,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:55,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:55,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:56,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:20:56,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 421 transitions, 5106 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:56,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:56,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:20:56,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:57,492 INFO L124 PetriNetUnfolderBase]: 3775/6155 cut-off events. [2024-06-14 12:20:57,492 INFO L125 PetriNetUnfolderBase]: For 1207261/1207261 co-relation queries the response was YES. [2024-06-14 12:20:57,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60127 conditions, 6155 events. 3775/6155 cut-off events. For 1207261/1207261 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38349 event pairs, 841 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 59979. Up to 5502 conditions per place. [2024-06-14 12:20:57,579 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 368 selfloop transitions, 30 changer transitions 0/439 dead transitions. [2024-06-14 12:20:57,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 439 transitions, 6020 flow [2024-06-14 12:20:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:20:57,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:20:57,581 INFO L175 Difference]: Start difference. First operand has 304 places, 421 transitions, 5106 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:20:57,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 439 transitions, 6020 flow [2024-06-14 12:20:59,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 439 transitions, 5919 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:59,640 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 5151 flow [2024-06-14 12:20:59,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5151, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2024-06-14 12:20:59,641 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 262 predicate places. [2024-06-14 12:20:59,641 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 5151 flow [2024-06-14 12:20:59,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:59,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:59,641 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 12:20:59,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:20:59,642 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 12:20:59,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1938119073, now seen corresponding path program 3 times [2024-06-14 12:20:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:59,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352260363] [2024-06-14 12:20:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:59,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:00,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352260363] [2024-06-14 12:21:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352260363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:00,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:00,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826766462] [2024-06-14 12:21:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:00,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:00,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 5151 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:00,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:00,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:00,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:01,909 INFO L124 PetriNetUnfolderBase]: 3853/6232 cut-off events. [2024-06-14 12:21:01,909 INFO L125 PetriNetUnfolderBase]: For 1218532/1218532 co-relation queries the response was YES. [2024-06-14 12:21:01,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61104 conditions, 6232 events. 3853/6232 cut-off events. For 1218532/1218532 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38435 event pairs, 869 based on Foata normal form. 1/6230 useless extension candidates. Maximal degree in co-relation 60954. Up to 5789 conditions per place. [2024-06-14 12:21:02,002 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 395 selfloop transitions, 31 changer transitions 0/437 dead transitions. [2024-06-14 12:21:02,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 437 transitions, 6039 flow [2024-06-14 12:21:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:21:02,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:21:02,003 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 5151 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:21:02,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 437 transitions, 6039 flow [2024-06-14 12:21:04,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 437 transitions, 5867 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:04,029 INFO L231 Difference]: Finished difference. Result has 310 places, 424 transitions, 5047 flow [2024-06-14 12:21:04,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4979, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5047, PETRI_PLACES=310, PETRI_TRANSITIONS=424} [2024-06-14 12:21:04,030 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 264 predicate places. [2024-06-14 12:21:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 424 transitions, 5047 flow [2024-06-14 12:21:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:04,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:04,035 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 12:21:04,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:21:04,035 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 12:21:04,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1938119352, now seen corresponding path program 1 times [2024-06-14 12:21:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984772224] [2024-06-14 12:21:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:04,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984772224] [2024-06-14 12:21:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984772224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:05,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:05,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633749704] [2024-06-14 12:21:05,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:05,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:05,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:21:05,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 424 transitions, 5047 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:05,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:05,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:21:05,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:06,529 INFO L124 PetriNetUnfolderBase]: 3697/6040 cut-off events. [2024-06-14 12:21:06,529 INFO L125 PetriNetUnfolderBase]: For 1245525/1245525 co-relation queries the response was YES. [2024-06-14 12:21:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60310 conditions, 6040 events. 3697/6040 cut-off events. For 1245525/1245525 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37832 event pairs, 833 based on Foata normal form. 2/5991 useless extension candidates. Maximal degree in co-relation 60159. Up to 5477 conditions per place. [2024-06-14 12:21:06,622 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 390 selfloop transitions, 18 changer transitions 0/440 dead transitions. [2024-06-14 12:21:06,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 440 transitions, 5967 flow [2024-06-14 12:21:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:21:06,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-14 12:21:06,623 INFO L175 Difference]: Start difference. First operand has 310 places, 424 transitions, 5047 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:21:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 440 transitions, 5967 flow [2024-06-14 12:21:08,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 440 transitions, 5897 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:08,580 INFO L231 Difference]: Finished difference. Result has 311 places, 427 transitions, 5093 flow [2024-06-14 12:21:08,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5093, PETRI_PLACES=311, PETRI_TRANSITIONS=427} [2024-06-14 12:21:08,581 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 265 predicate places. [2024-06-14 12:21:08,581 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 427 transitions, 5093 flow [2024-06-14 12:21:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:08,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:08,581 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 12:21:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:21:08,581 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 12:21:08,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash 678817690, now seen corresponding path program 2 times [2024-06-14 12:21:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876383791] [2024-06-14 12:21:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:09,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:09,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876383791] [2024-06-14 12:21:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876383791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:09,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:09,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830864305] [2024-06-14 12:21:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:09,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:09,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:21:09,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 427 transitions, 5093 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:09,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:09,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:21:09,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:11,098 INFO L124 PetriNetUnfolderBase]: 3718/6072 cut-off events. [2024-06-14 12:21:11,099 INFO L125 PetriNetUnfolderBase]: For 1279391/1279394 co-relation queries the response was YES. [2024-06-14 12:21:11,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61356 conditions, 6072 events. 3718/6072 cut-off events. For 1279391/1279394 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38020 event pairs, 837 based on Foata normal form. 4/6024 useless extension candidates. Maximal degree in co-relation 61204. Up to 5469 conditions per place. [2024-06-14 12:21:11,202 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 373 selfloop transitions, 43 changer transitions 0/448 dead transitions. [2024-06-14 12:21:11,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 448 transitions, 6569 flow [2024-06-14 12:21:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:21:11,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:21:11,203 INFO L175 Difference]: Start difference. First operand has 311 places, 427 transitions, 5093 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:21:11,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 448 transitions, 6569 flow [2024-06-14 12:21:13,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 448 transitions, 6475 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:13,250 INFO L231 Difference]: Finished difference. Result has 314 places, 436 transitions, 5319 flow [2024-06-14 12:21:13,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5319, PETRI_PLACES=314, PETRI_TRANSITIONS=436} [2024-06-14 12:21:13,251 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 268 predicate places. [2024-06-14 12:21:13,251 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 436 transitions, 5319 flow [2024-06-14 12:21:13,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:13,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:13,251 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 12:21:13,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:21:13,252 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 12:21:13,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash 678817411, now seen corresponding path program 4 times [2024-06-14 12:21:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720729818] [2024-06-14 12:21:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:14,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:14,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720729818] [2024-06-14 12:21:14,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720729818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:14,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:14,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604333425] [2024-06-14 12:21:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:14,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:14,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 436 transitions, 5319 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:14,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:14,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:14,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:15,700 INFO L124 PetriNetUnfolderBase]: 3884/6280 cut-off events. [2024-06-14 12:21:15,700 INFO L125 PetriNetUnfolderBase]: For 1302408/1302411 co-relation queries the response was YES. [2024-06-14 12:21:15,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62935 conditions, 6280 events. 3884/6280 cut-off events. For 1302408/1302411 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38754 event pairs, 876 based on Foata normal form. 1/6277 useless extension candidates. Maximal degree in co-relation 62782. Up to 5802 conditions per place. [2024-06-14 12:21:15,788 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 392 selfloop transitions, 50 changer transitions 0/453 dead transitions. [2024-06-14 12:21:15,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 453 transitions, 6593 flow [2024-06-14 12:21:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:21:15,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 12:21:15,789 INFO L175 Difference]: Start difference. First operand has 314 places, 436 transitions, 5319 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:21:15,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 453 transitions, 6593 flow [2024-06-14 12:21:17,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 453 transitions, 6490 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:17,690 INFO L231 Difference]: Finished difference. Result has 318 places, 442 transitions, 5492 flow [2024-06-14 12:21:17,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5492, PETRI_PLACES=318, PETRI_TRANSITIONS=442} [2024-06-14 12:21:17,691 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 272 predicate places. [2024-06-14 12:21:17,691 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 442 transitions, 5492 flow [2024-06-14 12:21:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:17,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:21:17,691 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 12:21:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 595884537, now seen corresponding path program 5 times [2024-06-14 12:21:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643285071] [2024-06-14 12:21:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643285071] [2024-06-14 12:21:18,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643285071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:18,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:18,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:18,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490044165] [2024-06-14 12:21:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:18,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:18,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:18,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:18,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:18,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 442 transitions, 5492 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:18,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:18,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:20,225 INFO L124 PetriNetUnfolderBase]: 3889/6287 cut-off events. [2024-06-14 12:21:20,225 INFO L125 PetriNetUnfolderBase]: For 1329634/1329637 co-relation queries the response was YES. [2024-06-14 12:21:20,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63575 conditions, 6287 events. 3889/6287 cut-off events. For 1329634/1329637 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38804 event pairs, 876 based on Foata normal form. 1/6284 useless extension candidates. Maximal degree in co-relation 63420. Up to 5808 conditions per place. [2024-06-14 12:21:20,324 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 394 selfloop transitions, 51 changer transitions 0/456 dead transitions. [2024-06-14 12:21:20,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 456 transitions, 6698 flow [2024-06-14 12:21:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:21:20,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:21:20,326 INFO L175 Difference]: Start difference. First operand has 318 places, 442 transitions, 5492 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:21:20,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 456 transitions, 6698 flow [2024-06-14 12:21:23,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 456 transitions, 6581 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:23,328 INFO L231 Difference]: Finished difference. Result has 323 places, 445 transitions, 5571 flow [2024-06-14 12:21:23,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5571, PETRI_PLACES=323, PETRI_TRANSITIONS=445} [2024-06-14 12:21:23,329 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 277 predicate places. [2024-06-14 12:21:23,329 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 445 transitions, 5571 flow [2024-06-14 12:21:23,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:23,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:23,330 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 12:21:23,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:21:23,330 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 12:21:23,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 595884816, now seen corresponding path program 3 times [2024-06-14 12:21:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749567686] [2024-06-14 12:21:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749567686] [2024-06-14 12:21:24,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749567686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:24,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:24,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643340729] [2024-06-14 12:21:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:24,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:24,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:21:24,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 445 transitions, 5571 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:24,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:24,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:21:24,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:25,901 INFO L124 PetriNetUnfolderBase]: 3722/6078 cut-off events. [2024-06-14 12:21:25,902 INFO L125 PetriNetUnfolderBase]: For 1347997/1348000 co-relation queries the response was YES. [2024-06-14 12:21:25,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62585 conditions, 6078 events. 3722/6078 cut-off events. For 1347997/1348000 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38038 event pairs, 836 based on Foata normal form. 4/6030 useless extension candidates. Maximal degree in co-relation 62428. Up to 5474 conditions per place. [2024-06-14 12:21:26,015 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 379 selfloop transitions, 42 changer transitions 0/456 dead transitions. [2024-06-14 12:21:26,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 456 transitions, 6643 flow [2024-06-14 12:21:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:21:26,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:21:26,016 INFO L175 Difference]: Start difference. First operand has 323 places, 445 transitions, 5571 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:21:26,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 456 transitions, 6643 flow [2024-06-14 12:21:28,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 456 transitions, 6407 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:28,150 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 5425 flow [2024-06-14 12:21:28,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5425, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-14 12:21:28,150 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 279 predicate places. [2024-06-14 12:21:28,150 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 5425 flow [2024-06-14 12:21:28,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:28,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:28,151 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 12:21:28,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:21:28,151 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 12:21:28,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 669613201, now seen corresponding path program 6 times [2024-06-14 12:21:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:28,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823930685] [2024-06-14 12:21:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:29,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823930685] [2024-06-14 12:21:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823930685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:29,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:29,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831143744] [2024-06-14 12:21:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:29,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:29,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 5425 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:29,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:29,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:29,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:30,534 INFO L124 PetriNetUnfolderBase]: 3880/6275 cut-off events. [2024-06-14 12:21:30,534 INFO L125 PetriNetUnfolderBase]: For 1362826/1362829 co-relation queries the response was YES. [2024-06-14 12:21:30,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63541 conditions, 6275 events. 3880/6275 cut-off events. For 1362826/1362829 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38779 event pairs, 875 based on Foata normal form. 1/6272 useless extension candidates. Maximal degree in co-relation 63383. Up to 5798 conditions per place. [2024-06-14 12:21:30,628 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 393 selfloop transitions, 51 changer transitions 0/455 dead transitions. [2024-06-14 12:21:30,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 455 transitions, 6339 flow [2024-06-14 12:21:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:21:30,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-14 12:21:30,630 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 5425 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:21:30,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 455 transitions, 6339 flow [2024-06-14 12:21:32,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 455 transitions, 6159 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:32,827 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 5353 flow [2024-06-14 12:21:32,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-14 12:21:32,828 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 279 predicate places. [2024-06-14 12:21:32,828 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 5353 flow [2024-06-14 12:21:32,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:32,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:32,828 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 12:21:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:21:32,828 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 12:21:32,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash 679144120, now seen corresponding path program 4 times [2024-06-14 12:21:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:32,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910458839] [2024-06-14 12:21:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910458839] [2024-06-14 12:21:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910458839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:33,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:33,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63256539] [2024-06-14 12:21:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:33,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:33,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:21:33,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 5353 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:33,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:33,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:21:33,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:35,276 INFO L124 PetriNetUnfolderBase]: 3713/6066 cut-off events. [2024-06-14 12:21:35,277 INFO L125 PetriNetUnfolderBase]: For 1381127/1381130 co-relation queries the response was YES. [2024-06-14 12:21:35,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62456 conditions, 6066 events. 3713/6066 cut-off events. For 1381127/1381130 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38036 event pairs, 836 based on Foata normal form. 4/6018 useless extension candidates. Maximal degree in co-relation 62297. Up to 5466 conditions per place. [2024-06-14 12:21:35,372 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 375 selfloop transitions, 45 changer transitions 0/455 dead transitions. [2024-06-14 12:21:35,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 455 transitions, 6219 flow [2024-06-14 12:21:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:21:35,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-14 12:21:35,373 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 5353 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:21:35,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 455 transitions, 6219 flow [2024-06-14 12:21:37,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 455 transitions, 6022 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:37,322 INFO L231 Difference]: Finished difference. Result has 326 places, 445 transitions, 5253 flow [2024-06-14 12:21:37,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5253, PETRI_PLACES=326, PETRI_TRANSITIONS=445} [2024-06-14 12:21:37,323 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 280 predicate places. [2024-06-14 12:21:37,323 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 445 transitions, 5253 flow [2024-06-14 12:21:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:37,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:37,323 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 12:21:37,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:21:37,324 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 12:21:37,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash 669612984, now seen corresponding path program 4 times [2024-06-14 12:21:37,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:37,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583663377] [2024-06-14 12:21:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:37,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:38,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583663377] [2024-06-14 12:21:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583663377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:38,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:38,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:38,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161938713] [2024-06-14 12:21:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:38,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:38,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:21:38,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 445 transitions, 5253 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:38,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:38,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:21:38,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:39,796 INFO L124 PetriNetUnfolderBase]: 3793/6189 cut-off events. [2024-06-14 12:21:39,796 INFO L125 PetriNetUnfolderBase]: For 1403412/1403415 co-relation queries the response was YES. [2024-06-14 12:21:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62760 conditions, 6189 events. 3793/6189 cut-off events. For 1403412/1403415 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38607 event pairs, 851 based on Foata normal form. 2/6187 useless extension candidates. Maximal degree in co-relation 62601. Up to 5511 conditions per place. [2024-06-14 12:21:39,895 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 377 selfloop transitions, 39 changer transitions 0/460 dead transitions. [2024-06-14 12:21:39,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 460 transitions, 6203 flow [2024-06-14 12:21:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:21:39,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:21:39,897 INFO L175 Difference]: Start difference. First operand has 326 places, 445 transitions, 5253 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:21:39,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 460 transitions, 6203 flow [2024-06-14 12:21:42,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 460 transitions, 6103 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:42,157 INFO L231 Difference]: Finished difference. Result has 326 places, 448 transitions, 5327 flow [2024-06-14 12:21:42,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5327, PETRI_PLACES=326, PETRI_TRANSITIONS=448} [2024-06-14 12:21:42,158 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 280 predicate places. [2024-06-14 12:21:42,158 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 448 transitions, 5327 flow [2024-06-14 12:21:42,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:42,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:42,158 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 12:21:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:21:42,159 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 12:21:42,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash 679156024, now seen corresponding path program 1 times [2024-06-14 12:21:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:42,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812286998] [2024-06-14 12:21:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:43,404 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 12:21:43,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:43,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812286998] [2024-06-14 12:21:43,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812286998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:43,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:43,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22474939] [2024-06-14 12:21:43,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:43,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:43,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:43,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:43,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 448 transitions, 5327 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:43,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:43,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:43,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:44,930 INFO L124 PetriNetUnfolderBase]: 3832/6186 cut-off events. [2024-06-14 12:21:44,931 INFO L125 PetriNetUnfolderBase]: For 1417427/1417427 co-relation queries the response was YES. [2024-06-14 12:21:44,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63589 conditions, 6186 events. 3832/6186 cut-off events. For 1417427/1417427 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38434 event pairs, 859 based on Foata normal form. 1/6136 useless extension candidates. Maximal degree in co-relation 63429. Up to 5737 conditions per place. [2024-06-14 12:21:45,026 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 412 selfloop transitions, 21 changer transitions 0/462 dead transitions. [2024-06-14 12:21:45,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 6319 flow [2024-06-14 12:21:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:21:45,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-14 12:21:45,028 INFO L175 Difference]: Start difference. First operand has 326 places, 448 transitions, 5327 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:21:45,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 6319 flow [2024-06-14 12:21:46,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 462 transitions, 6167 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:46,756 INFO L231 Difference]: Finished difference. Result has 329 places, 451 transitions, 5327 flow [2024-06-14 12:21:46,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5327, PETRI_PLACES=329, PETRI_TRANSITIONS=451} [2024-06-14 12:21:46,756 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 283 predicate places. [2024-06-14 12:21:46,756 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 451 transitions, 5327 flow [2024-06-14 12:21:46,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:46,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:46,757 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 12:21:46,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:21:46,757 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 12:21:46,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1113654376, now seen corresponding path program 1 times [2024-06-14 12:21:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:46,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423207679] [2024-06-14 12:21:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:46,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423207679] [2024-06-14 12:21:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423207679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:47,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721210718] [2024-06-14 12:21:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:47,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:47,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:47,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:47,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:47,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 451 transitions, 5327 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:47,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:47,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:47,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:49,243 INFO L124 PetriNetUnfolderBase]: 3935/6327 cut-off events. [2024-06-14 12:21:49,243 INFO L125 PetriNetUnfolderBase]: For 1451625/1451628 co-relation queries the response was YES. [2024-06-14 12:21:49,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64747 conditions, 6327 events. 3935/6327 cut-off events. For 1451625/1451628 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38914 event pairs, 821 based on Foata normal form. 2/6325 useless extension candidates. Maximal degree in co-relation 64586. Up to 5579 conditions per place. [2024-06-14 12:21:49,342 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 384 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-14 12:21:49,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 477 transitions, 6374 flow [2024-06-14 12:21:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 12:21:49,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-14 12:21:49,343 INFO L175 Difference]: Start difference. First operand has 329 places, 451 transitions, 5327 flow. Second operand 8 states and 164 transitions. [2024-06-14 12:21:49,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 477 transitions, 6374 flow [2024-06-14 12:21:51,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 477 transitions, 6156 flow, removed 49 selfloop flow, removed 10 redundant places. [2024-06-14 12:21:51,116 INFO L231 Difference]: Finished difference. Result has 327 places, 455 transitions, 5336 flow [2024-06-14 12:21:51,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5336, PETRI_PLACES=327, PETRI_TRANSITIONS=455} [2024-06-14 12:21:51,117 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 281 predicate places. [2024-06-14 12:21:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 455 transitions, 5336 flow [2024-06-14 12:21:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:51,117 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 12:21:51,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:21:51,118 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 12:21:51,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1288579694, now seen corresponding path program 2 times [2024-06-14 12:21:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078095942] [2024-06-14 12:21:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:51,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078095942] [2024-06-14 12:21:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078095942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:51,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:51,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814078389] [2024-06-14 12:21:51,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:52,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:52,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 455 transitions, 5336 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:52,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:52,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:52,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:53,478 INFO L124 PetriNetUnfolderBase]: 3945/6341 cut-off events. [2024-06-14 12:21:53,478 INFO L125 PetriNetUnfolderBase]: For 1479307/1479310 co-relation queries the response was YES. [2024-06-14 12:21:53,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65778 conditions, 6341 events. 3945/6341 cut-off events. For 1479307/1479310 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38939 event pairs, 821 based on Foata normal form. 2/6339 useless extension candidates. Maximal degree in co-relation 65617. Up to 5561 conditions per place. [2024-06-14 12:21:53,579 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 372 selfloop transitions, 68 changer transitions 0/478 dead transitions. [2024-06-14 12:21:53,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 478 transitions, 6383 flow [2024-06-14 12:21:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:21:53,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-14 12:21:53,581 INFO L175 Difference]: Start difference. First operand has 327 places, 455 transitions, 5336 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:21:53,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 478 transitions, 6383 flow [2024-06-14 12:21:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 478 transitions, 6184 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:55,654 INFO L231 Difference]: Finished difference. Result has 329 places, 459 transitions, 5400 flow [2024-06-14 12:21:55,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5137, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5400, PETRI_PLACES=329, PETRI_TRANSITIONS=459} [2024-06-14 12:21:55,655 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 283 predicate places. [2024-06-14 12:21:55,655 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 459 transitions, 5400 flow [2024-06-14 12:21:55,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:55,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:55,655 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 12:21:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:21:55,656 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 12:21:55,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash 741175920, now seen corresponding path program 1 times [2024-06-14 12:21:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791389402] [2024-06-14 12:21:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:55,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:56,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791389402] [2024-06-14 12:21:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791389402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:56,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:56,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970459892] [2024-06-14 12:21:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:56,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:21:56,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 459 transitions, 5400 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:56,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:56,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:21:56,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:58,131 INFO L124 PetriNetUnfolderBase]: 3882/6250 cut-off events. [2024-06-14 12:21:58,131 INFO L125 PetriNetUnfolderBase]: For 1527694/1527697 co-relation queries the response was YES. [2024-06-14 12:21:58,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66176 conditions, 6250 events. 3882/6250 cut-off events. For 1527694/1527697 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38651 event pairs, 808 based on Foata normal form. 8/6206 useless extension candidates. Maximal degree in co-relation 66014. Up to 5628 conditions per place. [2024-06-14 12:21:58,232 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 398 selfloop transitions, 61 changer transitions 0/490 dead transitions. [2024-06-14 12:21:58,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 490 transitions, 6650 flow [2024-06-14 12:21:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:21:58,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:21:58,233 INFO L175 Difference]: Start difference. First operand has 329 places, 459 transitions, 5400 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:21:58,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 490 transitions, 6650 flow [2024-06-14 12:22:00,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 490 transitions, 6419 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:00,406 INFO L231 Difference]: Finished difference. Result has 331 places, 471 transitions, 5607 flow [2024-06-14 12:22:00,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5169, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5607, PETRI_PLACES=331, PETRI_TRANSITIONS=471} [2024-06-14 12:22:00,407 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 285 predicate places. [2024-06-14 12:22:00,407 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 471 transitions, 5607 flow [2024-06-14 12:22:00,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:00,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:00,407 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 12:22:00,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:22:00,407 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 12:22:00,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1120156254, now seen corresponding path program 2 times [2024-06-14 12:22:00,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:00,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778136775] [2024-06-14 12:22:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:01,329 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 12:22:01,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:01,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778136775] [2024-06-14 12:22:01,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778136775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:01,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479875019] [2024-06-14 12:22:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:01,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:01,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 471 transitions, 5607 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:01,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:01,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:01,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:02,900 INFO L124 PetriNetUnfolderBase]: 3912/6289 cut-off events. [2024-06-14 12:22:02,900 INFO L125 PetriNetUnfolderBase]: For 1555564/1555567 co-relation queries the response was YES. [2024-06-14 12:22:02,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66862 conditions, 6289 events. 3912/6289 cut-off events. For 1555564/1555567 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38840 event pairs, 822 based on Foata normal form. 8/6245 useless extension candidates. Maximal degree in co-relation 66699. Up to 5449 conditions per place. [2024-06-14 12:22:03,000 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 323 selfloop transitions, 145 changer transitions 0/499 dead transitions. [2024-06-14 12:22:03,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 499 transitions, 7104 flow [2024-06-14 12:22:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:22:03,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:22:03,002 INFO L175 Difference]: Start difference. First operand has 331 places, 471 transitions, 5607 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:22:03,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 499 transitions, 7104 flow [2024-06-14 12:22:05,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 499 transitions, 6857 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:05,280 INFO L231 Difference]: Finished difference. Result has 333 places, 483 transitions, 5977 flow [2024-06-14 12:22:05,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5977, PETRI_PLACES=333, PETRI_TRANSITIONS=483} [2024-06-14 12:22:05,281 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 287 predicate places. [2024-06-14 12:22:05,281 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 483 transitions, 5977 flow [2024-06-14 12:22:05,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:05,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:05,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:22:05,281 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 12:22:05,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1349836246, now seen corresponding path program 3 times [2024-06-14 12:22:05,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:05,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179194562] [2024-06-14 12:22:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:05,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:06,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:06,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179194562] [2024-06-14 12:22:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179194562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:06,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:06,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419716891] [2024-06-14 12:22:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:06,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:06,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:06,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:06,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 483 transitions, 5977 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:06,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:06,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:06,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:07,816 INFO L124 PetriNetUnfolderBase]: 4031/6460 cut-off events. [2024-06-14 12:22:07,816 INFO L125 PetriNetUnfolderBase]: For 1578488/1578491 co-relation queries the response was YES. [2024-06-14 12:22:07,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68668 conditions, 6460 events. 4031/6460 cut-off events. For 1578488/1578491 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39641 event pairs, 834 based on Foata normal form. 2/6458 useless extension candidates. Maximal degree in co-relation 68504. Up to 5519 conditions per place. [2024-06-14 12:22:07,918 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 366 selfloop transitions, 97 changer transitions 0/507 dead transitions. [2024-06-14 12:22:07,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 507 transitions, 7403 flow [2024-06-14 12:22:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:22:07,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-14 12:22:07,919 INFO L175 Difference]: Start difference. First operand has 333 places, 483 transitions, 5977 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:22:07,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 507 transitions, 7403 flow [2024-06-14 12:22:10,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 507 transitions, 7045 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:10,206 INFO L231 Difference]: Finished difference. Result has 336 places, 490 transitions, 6024 flow [2024-06-14 12:22:10,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6024, PETRI_PLACES=336, PETRI_TRANSITIONS=490} [2024-06-14 12:22:10,207 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 290 predicate places. [2024-06-14 12:22:10,207 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 490 transitions, 6024 flow [2024-06-14 12:22:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:10,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:10,207 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 12:22:10,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:22:10,208 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 12:22:10,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:10,208 INFO L85 PathProgramCache]: Analyzing trace with hash -117360082, now seen corresponding path program 3 times [2024-06-14 12:22:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:10,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099526917] [2024-06-14 12:22:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:10,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099526917] [2024-06-14 12:22:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099526917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:11,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:11,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:11,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116752271] [2024-06-14 12:22:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:11,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:11,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:11,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:11,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 490 transitions, 6024 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:11,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:11,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:11,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:12,873 INFO L124 PetriNetUnfolderBase]: 3934/6321 cut-off events. [2024-06-14 12:22:12,873 INFO L125 PetriNetUnfolderBase]: For 1603116/1603119 co-relation queries the response was YES. [2024-06-14 12:22:12,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67914 conditions, 6321 events. 3934/6321 cut-off events. For 1603116/1603119 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39048 event pairs, 823 based on Foata normal form. 8/6277 useless extension candidates. Maximal degree in co-relation 67749. Up to 5469 conditions per place. [2024-06-14 12:22:12,975 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 333 selfloop transitions, 146 changer transitions 0/512 dead transitions. [2024-06-14 12:22:12,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 512 transitions, 7422 flow [2024-06-14 12:22:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:22:12,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:22:12,976 INFO L175 Difference]: Start difference. First operand has 336 places, 490 transitions, 6024 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:22:12,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 512 transitions, 7422 flow [2024-06-14 12:22:14,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 512 transitions, 7234 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:14,856 INFO L231 Difference]: Finished difference. Result has 340 places, 496 transitions, 6323 flow [2024-06-14 12:22:14,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5836, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6323, PETRI_PLACES=340, PETRI_TRANSITIONS=496} [2024-06-14 12:22:14,856 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 294 predicate places. [2024-06-14 12:22:14,856 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 496 transitions, 6323 flow [2024-06-14 12:22:14,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:14,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:14,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:14,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:22:14,858 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:14,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:14,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1615245183, now seen corresponding path program 1 times [2024-06-14 12:22:14,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:14,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314860465] [2024-06-14 12:22:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:14,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314860465] [2024-06-14 12:22:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314860465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:16,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:16,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:22:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376077154] [2024-06-14 12:22:16,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:16,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:22:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:22:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:22:16,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:16,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 496 transitions, 6323 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:16,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:18,239 INFO L124 PetriNetUnfolderBase]: 4191/6768 cut-off events. [2024-06-14 12:22:18,239 INFO L125 PetriNetUnfolderBase]: For 1651233/1651236 co-relation queries the response was YES. [2024-06-14 12:22:18,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70724 conditions, 6768 events. 4191/6768 cut-off events. For 1651233/1651236 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 42526 event pairs, 799 based on Foata normal form. 12/6776 useless extension candidates. Maximal degree in co-relation 70557. Up to 5237 conditions per place. [2024-06-14 12:22:18,348 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 396 selfloop transitions, 105 changer transitions 0/547 dead transitions. [2024-06-14 12:22:18,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 547 transitions, 7633 flow [2024-06-14 12:22:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:22:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:22:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 12:22:18,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-06-14 12:22:18,349 INFO L175 Difference]: Start difference. First operand has 340 places, 496 transitions, 6323 flow. Second operand 10 states and 212 transitions. [2024-06-14 12:22:18,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 547 transitions, 7633 flow [2024-06-14 12:22:20,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 547 transitions, 7282 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:20,911 INFO L231 Difference]: Finished difference. Result has 347 places, 507 transitions, 6373 flow [2024-06-14 12:22:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5972, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6373, PETRI_PLACES=347, PETRI_TRANSITIONS=507} [2024-06-14 12:22:20,912 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 301 predicate places. [2024-06-14 12:22:20,912 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 507 transitions, 6373 flow [2024-06-14 12:22:20,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:20,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:20,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:20,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:22:20,913 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 12:22:20,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash 995151544, now seen corresponding path program 1 times [2024-06-14 12:22:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:20,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680230059] [2024-06-14 12:22:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680230059] [2024-06-14 12:22:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680230059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:21,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:21,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913818996] [2024-06-14 12:22:21,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:21,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:22,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:22:22,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 507 transitions, 6373 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:22,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:22,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:22:22,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:23,799 INFO L124 PetriNetUnfolderBase]: 4066/6635 cut-off events. [2024-06-14 12:22:23,800 INFO L125 PetriNetUnfolderBase]: For 1659733/1659738 co-relation queries the response was YES. [2024-06-14 12:22:23,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70596 conditions, 6635 events. 4066/6635 cut-off events. For 1659733/1659738 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42435 event pairs, 815 based on Foata normal form. 8/6568 useless extension candidates. Maximal degree in co-relation 70426. Up to 5727 conditions per place. [2024-06-14 12:22:23,911 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 420 selfloop transitions, 46 changer transitions 0/540 dead transitions. [2024-06-14 12:22:23,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 540 transitions, 7544 flow [2024-06-14 12:22:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 12:22:23,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:22:23,912 INFO L175 Difference]: Start difference. First operand has 347 places, 507 transitions, 6373 flow. Second operand 9 states and 186 transitions. [2024-06-14 12:22:23,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 540 transitions, 7544 flow [2024-06-14 12:22:26,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 540 transitions, 7332 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 12:22:26,646 INFO L231 Difference]: Finished difference. Result has 351 places, 516 transitions, 6471 flow [2024-06-14 12:22:26,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=351, PETRI_TRANSITIONS=516} [2024-06-14 12:22:26,646 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 305 predicate places. [2024-06-14 12:22:26,647 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 516 transitions, 6471 flow [2024-06-14 12:22:26,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:26,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:26,647 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 12:22:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:22:26,647 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 12:22:26,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1005627064, now seen corresponding path program 2 times [2024-06-14 12:22:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:26,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189211654] [2024-06-14 12:22:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:27,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189211654] [2024-06-14 12:22:27,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189211654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:27,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:27,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620605687] [2024-06-14 12:22:27,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:27,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:27,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:27,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:27,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:22:27,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 516 transitions, 6471 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:27,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:27,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:22:27,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:29,468 INFO L124 PetriNetUnfolderBase]: 4082/6671 cut-off events. [2024-06-14 12:22:29,468 INFO L125 PetriNetUnfolderBase]: For 1685911/1685916 co-relation queries the response was YES. [2024-06-14 12:22:29,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71220 conditions, 6671 events. 4082/6671 cut-off events. For 1685911/1685916 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42803 event pairs, 831 based on Foata normal form. 8/6621 useless extension candidates. Maximal degree in co-relation 71049. Up to 5785 conditions per place. [2024-06-14 12:22:29,591 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 415 selfloop transitions, 50 changer transitions 0/539 dead transitions. [2024-06-14 12:22:29,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 539 transitions, 7593 flow [2024-06-14 12:22:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 12:22:29,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44938271604938274 [2024-06-14 12:22:29,593 INFO L175 Difference]: Start difference. First operand has 351 places, 516 transitions, 6471 flow. Second operand 9 states and 182 transitions. [2024-06-14 12:22:29,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 539 transitions, 7593 flow [2024-06-14 12:22:32,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 539 transitions, 7408 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:32,785 INFO L231 Difference]: Finished difference. Result has 356 places, 520 transitions, 6540 flow [2024-06-14 12:22:32,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6286, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6540, PETRI_PLACES=356, PETRI_TRANSITIONS=520} [2024-06-14 12:22:32,785 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 310 predicate places. [2024-06-14 12:22:32,785 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 520 transitions, 6540 flow [2024-06-14 12:22:32,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:32,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:32,786 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 12:22:32,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:22:32,786 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 12:22:32,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1349713114, now seen corresponding path program 3 times [2024-06-14 12:22:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20116289] [2024-06-14 12:22:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:32,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20116289] [2024-06-14 12:22:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20116289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450779018] [2024-06-14 12:22:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:22:33,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 520 transitions, 6540 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:33,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:33,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:22:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:35,511 INFO L124 PetriNetUnfolderBase]: 4098/6691 cut-off events. [2024-06-14 12:22:35,512 INFO L125 PetriNetUnfolderBase]: For 1719325/1719328 co-relation queries the response was YES. [2024-06-14 12:22:35,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71875 conditions, 6691 events. 4098/6691 cut-off events. For 1719325/1719328 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42840 event pairs, 835 based on Foata normal form. 6/6645 useless extension candidates. Maximal degree in co-relation 71702. Up to 5714 conditions per place. [2024-06-14 12:22:35,624 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 371 selfloop transitions, 94 changer transitions 0/539 dead transitions. [2024-06-14 12:22:35,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 539 transitions, 7642 flow [2024-06-14 12:22:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 12:22:35,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-14 12:22:35,626 INFO L175 Difference]: Start difference. First operand has 356 places, 520 transitions, 6540 flow. Second operand 8 states and 164 transitions. [2024-06-14 12:22:35,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 539 transitions, 7642 flow [2024-06-14 12:22:39,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 539 transitions, 7440 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:39,156 INFO L231 Difference]: Finished difference. Result has 358 places, 523 transitions, 6668 flow [2024-06-14 12:22:39,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6668, PETRI_PLACES=358, PETRI_TRANSITIONS=523} [2024-06-14 12:22:39,156 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 312 predicate places. [2024-06-14 12:22:39,156 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 523 transitions, 6668 flow [2024-06-14 12:22:39,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:39,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:39,157 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 12:22:39,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:22:39,157 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 12:22:39,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:39,157 INFO L85 PathProgramCache]: Analyzing trace with hash 717113862, now seen corresponding path program 1 times [2024-06-14 12:22:39,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:39,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352420390] [2024-06-14 12:22:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:39,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:40,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:40,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352420390] [2024-06-14 12:22:40,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352420390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:40,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581164900] [2024-06-14 12:22:40,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:40,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:40,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:40,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:40,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 523 transitions, 6668 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:40,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:40,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:40,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:42,141 INFO L124 PetriNetUnfolderBase]: 4191/6792 cut-off events. [2024-06-14 12:22:42,141 INFO L125 PetriNetUnfolderBase]: For 1729271/1729276 co-relation queries the response was YES. [2024-06-14 12:22:42,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72823 conditions, 6792 events. 4191/6792 cut-off events. For 1729271/1729276 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43103 event pairs, 858 based on Foata normal form. 6/6740 useless extension candidates. Maximal degree in co-relation 72649. Up to 6120 conditions per place. [2024-06-14 12:22:42,291 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 456 selfloop transitions, 58 changer transitions 0/547 dead transitions. [2024-06-14 12:22:42,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 547 transitions, 7886 flow [2024-06-14 12:22:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:22:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:22:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:22:42,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:22:42,292 INFO L175 Difference]: Start difference. First operand has 358 places, 523 transitions, 6668 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:22:42,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 547 transitions, 7886 flow [2024-06-14 12:22:45,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 547 transitions, 7582 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:45,985 INFO L231 Difference]: Finished difference. Result has 363 places, 528 transitions, 6635 flow [2024-06-14 12:22:45,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6635, PETRI_PLACES=363, PETRI_TRANSITIONS=528} [2024-06-14 12:22:45,985 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 317 predicate places. [2024-06-14 12:22:45,985 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 528 transitions, 6635 flow [2024-06-14 12:22:45,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:45,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:45,986 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 12:22:45,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:22:45,986 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 12:22:45,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1362378704, now seen corresponding path program 2 times [2024-06-14 12:22:45,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380394187] [2024-06-14 12:22:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380394187] [2024-06-14 12:22:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380394187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:46,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:46,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:46,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429590832] [2024-06-14 12:22:46,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:46,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:47,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:47,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 528 transitions, 6635 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:47,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:47,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:47,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:48,751 INFO L124 PetriNetUnfolderBase]: 4241/6859 cut-off events. [2024-06-14 12:22:48,751 INFO L125 PetriNetUnfolderBase]: For 1792127/1792130 co-relation queries the response was YES. [2024-06-14 12:22:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74654 conditions, 6859 events. 4241/6859 cut-off events. For 1792127/1792130 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43524 event pairs, 861 based on Foata normal form. 4/6811 useless extension candidates. Maximal degree in co-relation 74478. Up to 5847 conditions per place. [2024-06-14 12:22:48,874 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 371 selfloop transitions, 155 changer transitions 0/559 dead transitions. [2024-06-14 12:22:48,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 559 transitions, 8631 flow [2024-06-14 12:22:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:22:48,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419753086419753 [2024-06-14 12:22:48,876 INFO L175 Difference]: Start difference. First operand has 363 places, 528 transitions, 6635 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:22:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 559 transitions, 8631 flow [2024-06-14 12:22:52,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 559 transitions, 8418 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:52,751 INFO L231 Difference]: Finished difference. Result has 367 places, 540 transitions, 7275 flow [2024-06-14 12:22:52,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7275, PETRI_PLACES=367, PETRI_TRANSITIONS=540} [2024-06-14 12:22:52,752 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 321 predicate places. [2024-06-14 12:22:52,752 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 540 transitions, 7275 flow [2024-06-14 12:22:52,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:52,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:52,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:22:52,753 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 12:22:52,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1362796770, now seen corresponding path program 1 times [2024-06-14 12:22:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:52,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503041261] [2024-06-14 12:22:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:53,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:53,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503041261] [2024-06-14 12:22:53,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503041261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:53,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:53,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:53,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775017662] [2024-06-14 12:22:53,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:53,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:53,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:53,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:22:53,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 540 transitions, 7275 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:53,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:53,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:22:53,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:55,655 INFO L124 PetriNetUnfolderBase]: 4246/6868 cut-off events. [2024-06-14 12:22:55,655 INFO L125 PetriNetUnfolderBase]: For 1826193/1826195 co-relation queries the response was YES. [2024-06-14 12:22:55,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76215 conditions, 6868 events. 4246/6868 cut-off events. For 1826193/1826195 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43580 event pairs, 858 based on Foata normal form. 3/6820 useless extension candidates. Maximal degree in co-relation 76036. Up to 6330 conditions per place. [2024-06-14 12:22:55,780 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 494 selfloop transitions, 33 changer transitions 0/560 dead transitions. [2024-06-14 12:22:55,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 560 transitions, 8496 flow [2024-06-14 12:22:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:22:55,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:22:55,807 INFO L175 Difference]: Start difference. First operand has 367 places, 540 transitions, 7275 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:22:55,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 560 transitions, 8496 flow [2024-06-14 12:22:59,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 560 transitions, 8279 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:59,434 INFO L231 Difference]: Finished difference. Result has 372 places, 543 transitions, 7254 flow [2024-06-14 12:22:59,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7254, PETRI_PLACES=372, PETRI_TRANSITIONS=543} [2024-06-14 12:22:59,434 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 326 predicate places. [2024-06-14 12:22:59,434 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 543 transitions, 7254 flow [2024-06-14 12:22:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:59,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:59,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:22:59,435 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 12:22:59,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1350143580, now seen corresponding path program 3 times [2024-06-14 12:22:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:59,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923274689] [2024-06-14 12:22:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:00,476 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 12:23:00,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:00,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923274689] [2024-06-14 12:23:00,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923274689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:00,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:00,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249564757] [2024-06-14 12:23:00,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:00,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:00,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:00,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 543 transitions, 7254 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:00,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:00,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:00,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:02,494 INFO L124 PetriNetUnfolderBase]: 4268/6896 cut-off events. [2024-06-14 12:23:02,494 INFO L125 PetriNetUnfolderBase]: For 1845702/1845705 co-relation queries the response was YES. [2024-06-14 12:23:02,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76806 conditions, 6896 events. 4268/6896 cut-off events. For 1845702/1845705 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43654 event pairs, 854 based on Foata normal form. 4/6848 useless extension candidates. Maximal degree in co-relation 76625. Up to 5867 conditions per place. [2024-06-14 12:23:02,611 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 376 selfloop transitions, 157 changer transitions 0/566 dead transitions. [2024-06-14 12:23:02,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 566 transitions, 9029 flow [2024-06-14 12:23:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:23:02,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-14 12:23:02,612 INFO L175 Difference]: Start difference. First operand has 372 places, 543 transitions, 7254 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:23:02,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 566 transitions, 9029 flow [2024-06-14 12:23:06,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 566 transitions, 8857 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:06,219 INFO L231 Difference]: Finished difference. Result has 374 places, 547 transitions, 7525 flow [2024-06-14 12:23:06,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7525, PETRI_PLACES=374, PETRI_TRANSITIONS=547} [2024-06-14 12:23:06,220 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 328 predicate places. [2024-06-14 12:23:06,220 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 547 transitions, 7525 flow [2024-06-14 12:23:06,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:06,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:06,220 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 12:23:06,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:23:06,220 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 12:23:06,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1362782324, now seen corresponding path program 4 times [2024-06-14 12:23:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:06,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245686463] [2024-06-14 12:23:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:07,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:07,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245686463] [2024-06-14 12:23:07,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245686463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:07,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:07,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:07,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748727665] [2024-06-14 12:23:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:07,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:07,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:07,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 547 transitions, 7525 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:07,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:07,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:09,049 INFO L124 PetriNetUnfolderBase]: 4264/6891 cut-off events. [2024-06-14 12:23:09,049 INFO L125 PetriNetUnfolderBase]: For 1860798/1860801 co-relation queries the response was YES. [2024-06-14 12:23:09,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77134 conditions, 6891 events. 4264/6891 cut-off events. For 1860798/1860801 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43642 event pairs, 860 based on Foata normal form. 4/6843 useless extension candidates. Maximal degree in co-relation 76952. Up to 5865 conditions per place. [2024-06-14 12:23:09,173 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 377 selfloop transitions, 155 changer transitions 0/565 dead transitions. [2024-06-14 12:23:09,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 565 transitions, 8941 flow [2024-06-14 12:23:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:23:09,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-14 12:23:09,174 INFO L175 Difference]: Start difference. First operand has 374 places, 547 transitions, 7525 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:23:09,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 565 transitions, 8941 flow [2024-06-14 12:23:12,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 565 transitions, 8407 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:12,634 INFO L231 Difference]: Finished difference. Result has 376 places, 547 transitions, 7310 flow [2024-06-14 12:23:12,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6991, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7310, PETRI_PLACES=376, PETRI_TRANSITIONS=547} [2024-06-14 12:23:12,634 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 330 predicate places. [2024-06-14 12:23:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 547 transitions, 7310 flow [2024-06-14 12:23:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:12,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:12,636 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 12:23:12,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:23:12,636 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 12:23:12,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash -641668270, now seen corresponding path program 4 times [2024-06-14 12:23:12,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:12,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221000514] [2024-06-14 12:23:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:13,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221000514] [2024-06-14 12:23:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221000514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:13,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:13,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:13,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447116906] [2024-06-14 12:23:13,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:13,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:13,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:13,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 547 transitions, 7310 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:13,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:13,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:13,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:15,363 INFO L124 PetriNetUnfolderBase]: 4343/6999 cut-off events. [2024-06-14 12:23:15,363 INFO L125 PetriNetUnfolderBase]: For 1888875/1888875 co-relation queries the response was YES. [2024-06-14 12:23:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77768 conditions, 6999 events. 4343/6999 cut-off events. For 1888875/1888875 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44030 event pairs, 876 based on Foata normal form. 1/6981 useless extension candidates. Maximal degree in co-relation 77586. Up to 6201 conditions per place. [2024-06-14 12:23:15,488 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 464 selfloop transitions, 60 changer transitions 0/570 dead transitions. [2024-06-14 12:23:15,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 570 transitions, 8519 flow [2024-06-14 12:23:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:23:15,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-14 12:23:15,490 INFO L175 Difference]: Start difference. First operand has 376 places, 547 transitions, 7310 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:23:15,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 570 transitions, 8519 flow [2024-06-14 12:23:19,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 570 transitions, 8232 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:19,943 INFO L231 Difference]: Finished difference. Result has 377 places, 550 transitions, 7255 flow [2024-06-14 12:23:19,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7023, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7255, PETRI_PLACES=377, PETRI_TRANSITIONS=550} [2024-06-14 12:23:19,943 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 331 predicate places. [2024-06-14 12:23:19,943 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 550 transitions, 7255 flow [2024-06-14 12:23:19,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:19,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:19,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:19,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:23:19,944 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 12:23:19,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash -220586094, now seen corresponding path program 5 times [2024-06-14 12:23:19,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:19,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951431417] [2024-06-14 12:23:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:19,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951431417] [2024-06-14 12:23:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951431417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:20,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255985930] [2024-06-14 12:23:20,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:20,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:20,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:20,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 550 transitions, 7255 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:20,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:20,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:22,791 INFO L124 PetriNetUnfolderBase]: 4356/7026 cut-off events. [2024-06-14 12:23:22,791 INFO L125 PetriNetUnfolderBase]: For 1928798/1928798 co-relation queries the response was YES. [2024-06-14 12:23:22,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78359 conditions, 7026 events. 4356/7026 cut-off events. For 1928798/1928798 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 44336 event pairs, 875 based on Foata normal form. 1/7006 useless extension candidates. Maximal degree in co-relation 78176. Up to 6203 conditions per place. [2024-06-14 12:23:22,916 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 456 selfloop transitions, 72 changer transitions 0/574 dead transitions. [2024-06-14 12:23:22,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 574 transitions, 8828 flow [2024-06-14 12:23:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:23:22,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-14 12:23:22,917 INFO L175 Difference]: Start difference. First operand has 377 places, 550 transitions, 7255 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:23:22,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 574 transitions, 8828 flow [2024-06-14 12:23:27,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 574 transitions, 8622 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:27,120 INFO L231 Difference]: Finished difference. Result has 380 places, 556 transitions, 7446 flow [2024-06-14 12:23:27,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7446, PETRI_PLACES=380, PETRI_TRANSITIONS=556} [2024-06-14 12:23:27,121 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 334 predicate places. [2024-06-14 12:23:27,121 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 556 transitions, 7446 flow [2024-06-14 12:23:27,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:27,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:27,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:27,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:23:27,122 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 12:23:27,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash -461819724, now seen corresponding path program 6 times [2024-06-14 12:23:27,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:27,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166604531] [2024-06-14 12:23:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:27,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166604531] [2024-06-14 12:23:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166604531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:27,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:27,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189141675] [2024-06-14 12:23:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:27,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:28,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:28,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 556 transitions, 7446 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:28,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:28,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:28,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:29,926 INFO L124 PetriNetUnfolderBase]: 4353/7022 cut-off events. [2024-06-14 12:23:29,927 INFO L125 PetriNetUnfolderBase]: For 1952130/1952130 co-relation queries the response was YES. [2024-06-14 12:23:30,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78728 conditions, 7022 events. 4353/7022 cut-off events. For 1952130/1952130 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 44307 event pairs, 876 based on Foata normal form. 1/7002 useless extension candidates. Maximal degree in co-relation 78543. Up to 6215 conditions per place. [2024-06-14 12:23:30,050 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 471 selfloop transitions, 60 changer transitions 0/577 dead transitions. [2024-06-14 12:23:30,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 577 transitions, 8574 flow [2024-06-14 12:23:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:23:30,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-14 12:23:30,051 INFO L175 Difference]: Start difference. First operand has 380 places, 556 transitions, 7446 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:23:30,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 577 transitions, 8574 flow [2024-06-14 12:23:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 577 transitions, 8313 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:33,741 INFO L231 Difference]: Finished difference. Result has 385 places, 556 transitions, 7311 flow [2024-06-14 12:23:33,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7311, PETRI_PLACES=385, PETRI_TRANSITIONS=556} [2024-06-14 12:23:33,742 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 339 predicate places. [2024-06-14 12:23:33,742 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 556 transitions, 7311 flow [2024-06-14 12:23:33,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:33,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:33,743 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 12:23:33,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:23:33,743 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 12:23:33,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash -461640234, now seen corresponding path program 7 times [2024-06-14 12:23:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128399377] [2024-06-14 12:23:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:34,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128399377] [2024-06-14 12:23:34,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128399377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:34,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951689644] [2024-06-14 12:23:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:34,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:34,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 556 transitions, 7311 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:34,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:34,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:34,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:36,490 INFO L124 PetriNetUnfolderBase]: 4349/7007 cut-off events. [2024-06-14 12:23:36,491 INFO L125 PetriNetUnfolderBase]: For 1974598/1974598 co-relation queries the response was YES. [2024-06-14 12:23:36,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78731 conditions, 7007 events. 4349/7007 cut-off events. For 1974598/1974598 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44100 event pairs, 875 based on Foata normal form. 1/6987 useless extension candidates. Maximal degree in co-relation 78544. Up to 6197 conditions per place. [2024-06-14 12:23:36,610 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 464 selfloop transitions, 67 changer transitions 0/577 dead transitions. [2024-06-14 12:23:36,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 577 transitions, 8541 flow [2024-06-14 12:23:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:23:36,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:23:36,612 INFO L175 Difference]: Start difference. First operand has 385 places, 556 transitions, 7311 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:23:36,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 577 transitions, 8541 flow [2024-06-14 12:23:40,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 577 transitions, 8424 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:40,887 INFO L231 Difference]: Finished difference. Result has 386 places, 559 transitions, 7453 flow [2024-06-14 12:23:40,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7453, PETRI_PLACES=386, PETRI_TRANSITIONS=559} [2024-06-14 12:23:40,888 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 340 predicate places. [2024-06-14 12:23:40,888 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 559 transitions, 7453 flow [2024-06-14 12:23:40,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:40,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:40,888 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 12:23:40,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:23:40,889 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 12:23:40,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash -461639986, now seen corresponding path program 4 times [2024-06-14 12:23:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:40,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081972544] [2024-06-14 12:23:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:40,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:41,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:41,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081972544] [2024-06-14 12:23:41,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081972544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:41,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:41,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:41,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641382000] [2024-06-14 12:23:41,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:41,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:41,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:41,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:41,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 559 transitions, 7453 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:41,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:41,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:41,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:43,708 INFO L124 PetriNetUnfolderBase]: 4264/6890 cut-off events. [2024-06-14 12:23:43,708 INFO L125 PetriNetUnfolderBase]: For 1990824/1990824 co-relation queries the response was YES. [2024-06-14 12:23:43,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78042 conditions, 6890 events. 4264/6890 cut-off events. For 1990824/1990824 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43616 event pairs, 856 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 77854. Up to 6225 conditions per place. [2024-06-14 12:23:43,832 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 485 selfloop transitions, 54 changer transitions 0/576 dead transitions. [2024-06-14 12:23:43,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 576 transitions, 8583 flow [2024-06-14 12:23:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:23:43,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41728395061728396 [2024-06-14 12:23:43,834 INFO L175 Difference]: Start difference. First operand has 386 places, 559 transitions, 7453 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:23:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 576 transitions, 8583 flow [2024-06-14 12:23:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 576 transitions, 8296 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:47,350 INFO L231 Difference]: Finished difference. Result has 389 places, 559 transitions, 7284 flow [2024-06-14 12:23:47,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7284, PETRI_PLACES=389, PETRI_TRANSITIONS=559} [2024-06-14 12:23:47,350 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 343 predicate places. [2024-06-14 12:23:47,350 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 559 transitions, 7284 flow [2024-06-14 12:23:47,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:47,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:47,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:47,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:23:47,351 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 12:23:47,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -48333106, now seen corresponding path program 5 times [2024-06-14 12:23:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:47,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108987335] [2024-06-14 12:23:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:48,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:48,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108987335] [2024-06-14 12:23:48,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108987335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:48,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:48,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024570192] [2024-06-14 12:23:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:48,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:48,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:48,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:48,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:48,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 559 transitions, 7284 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:48,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:48,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:48,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:49,990 INFO L124 PetriNetUnfolderBase]: 4277/6898 cut-off events. [2024-06-14 12:23:49,991 INFO L125 PetriNetUnfolderBase]: For 2019717/2019717 co-relation queries the response was YES. [2024-06-14 12:23:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78397 conditions, 6898 events. 4277/6898 cut-off events. For 2019717/2019717 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43556 event pairs, 855 based on Foata normal form. 1/6835 useless extension candidates. Maximal degree in co-relation 78208. Up to 6191 conditions per place. [2024-06-14 12:23:50,116 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 460 selfloop transitions, 83 changer transitions 0/580 dead transitions. [2024-06-14 12:23:50,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 580 transitions, 8799 flow [2024-06-14 12:23:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:23:50,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-14 12:23:50,118 INFO L175 Difference]: Start difference. First operand has 389 places, 559 transitions, 7284 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:23:50,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 580 transitions, 8799 flow [2024-06-14 12:23:53,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 580 transitions, 8467 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:53,957 INFO L231 Difference]: Finished difference. Result has 389 places, 565 transitions, 7278 flow [2024-06-14 12:23:53,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7278, PETRI_PLACES=389, PETRI_TRANSITIONS=565} [2024-06-14 12:23:53,957 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 343 predicate places. [2024-06-14 12:23:53,958 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 565 transitions, 7278 flow [2024-06-14 12:23:53,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:53,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:53,958 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 12:23:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:23:53,958 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 12:23:53,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash -690734268, now seen corresponding path program 8 times [2024-06-14 12:23:53,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:53,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917436852] [2024-06-14 12:23:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:54,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:54,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917436852] [2024-06-14 12:23:54,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917436852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:54,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:54,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:54,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151865183] [2024-06-14 12:23:54,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:54,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:54,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:55,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:23:55,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 565 transitions, 7278 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:55,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:55,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:23:55,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:56,773 INFO L124 PetriNetUnfolderBase]: 4364/7025 cut-off events. [2024-06-14 12:23:56,773 INFO L125 PetriNetUnfolderBase]: For 2068248/2068248 co-relation queries the response was YES. [2024-06-14 12:23:56,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79754 conditions, 7025 events. 4364/7025 cut-off events. For 2068248/2068248 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44136 event pairs, 874 based on Foata normal form. 1/7005 useless extension candidates. Maximal degree in co-relation 79563. Up to 6155 conditions per place. [2024-06-14 12:23:56,897 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 438 selfloop transitions, 100 changer transitions 0/586 dead transitions. [2024-06-14 12:23:56,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 586 transitions, 8895 flow [2024-06-14 12:23:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:23:56,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:23:56,899 INFO L175 Difference]: Start difference. First operand has 389 places, 565 transitions, 7278 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:23:56,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 586 transitions, 8895 flow [2024-06-14 12:24:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 586 transitions, 8689 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:01,486 INFO L231 Difference]: Finished difference. Result has 392 places, 571 transitions, 7528 flow [2024-06-14 12:24:01,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7528, PETRI_PLACES=392, PETRI_TRANSITIONS=571} [2024-06-14 12:24:01,488 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 346 predicate places. [2024-06-14 12:24:01,488 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 571 transitions, 7528 flow [2024-06-14 12:24:01,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:01,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:01,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:24:01,491 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 12:24:01,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -47857876, now seen corresponding path program 6 times [2024-06-14 12:24:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:01,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841726489] [2024-06-14 12:24:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:02,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:02,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841726489] [2024-06-14 12:24:02,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841726489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:02,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:02,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:02,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079591161] [2024-06-14 12:24:02,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:02,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:02,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:02,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 571 transitions, 7528 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:02,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:02,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:02,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:04,252 INFO L124 PetriNetUnfolderBase]: 4287/6912 cut-off events. [2024-06-14 12:24:04,252 INFO L125 PetriNetUnfolderBase]: For 2086407/2086407 co-relation queries the response was YES. [2024-06-14 12:24:04,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79407 conditions, 6912 events. 4287/6912 cut-off events. For 2086407/2086407 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43599 event pairs, 855 based on Foata normal form. 1/6849 useless extension candidates. Maximal degree in co-relation 79215. Up to 6201 conditions per place. [2024-06-14 12:24:04,372 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 458 selfloop transitions, 88 changer transitions 0/585 dead transitions. [2024-06-14 12:24:04,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 585 transitions, 8661 flow [2024-06-14 12:24:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:24:04,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:24:04,373 INFO L175 Difference]: Start difference. First operand has 392 places, 571 transitions, 7528 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:24:04,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 585 transitions, 8661 flow [2024-06-14 12:24:08,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 585 transitions, 8370 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:08,170 INFO L231 Difference]: Finished difference. Result has 396 places, 571 transitions, 7419 flow [2024-06-14 12:24:08,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7419, PETRI_PLACES=396, PETRI_TRANSITIONS=571} [2024-06-14 12:24:08,171 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 350 predicate places. [2024-06-14 12:24:08,171 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 571 transitions, 7419 flow [2024-06-14 12:24:08,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:08,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:08,172 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 12:24:08,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:24:08,172 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 12:24:08,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash -48096204, now seen corresponding path program 9 times [2024-06-14 12:24:08,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:08,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572779388] [2024-06-14 12:24:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:08,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:09,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:09,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572779388] [2024-06-14 12:24:09,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572779388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:09,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:09,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876172200] [2024-06-14 12:24:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:09,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:09,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 571 transitions, 7419 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:09,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:09,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:09,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:11,025 INFO L124 PetriNetUnfolderBase]: 4358/7017 cut-off events. [2024-06-14 12:24:11,025 INFO L125 PetriNetUnfolderBase]: For 2113779/2113779 co-relation queries the response was YES. [2024-06-14 12:24:11,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80108 conditions, 7017 events. 4358/7017 cut-off events. For 2113779/2113779 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44122 event pairs, 874 based on Foata normal form. 1/6997 useless extension candidates. Maximal degree in co-relation 79914. Up to 6149 conditions per place. [2024-06-14 12:24:11,148 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 433 selfloop transitions, 104 changer transitions 0/585 dead transitions. [2024-06-14 12:24:11,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 585 transitions, 8534 flow [2024-06-14 12:24:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:11,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:24:11,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:24:11,150 INFO L175 Difference]: Start difference. First operand has 396 places, 571 transitions, 7419 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:24:11,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 585 transitions, 8534 flow [2024-06-14 12:24:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 585 transitions, 8270 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:15,977 INFO L231 Difference]: Finished difference. Result has 397 places, 571 transitions, 7369 flow [2024-06-14 12:24:15,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7155, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7369, PETRI_PLACES=397, PETRI_TRANSITIONS=571} [2024-06-14 12:24:15,978 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 351 predicate places. [2024-06-14 12:24:15,978 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 571 transitions, 7369 flow [2024-06-14 12:24:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:15,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:15,978 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 12:24:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:24:15,979 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 12:24:15,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash -893913684, now seen corresponding path program 7 times [2024-06-14 12:24:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729715673] [2024-06-14 12:24:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:16,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729715673] [2024-06-14 12:24:16,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729715673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:16,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:16,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:16,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447074044] [2024-06-14 12:24:16,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:16,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:16,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 571 transitions, 7369 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:16,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:16,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:16,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:18,682 INFO L124 PetriNetUnfolderBase]: 4294/6933 cut-off events. [2024-06-14 12:24:18,682 INFO L125 PetriNetUnfolderBase]: For 2144145/2144148 co-relation queries the response was YES. [2024-06-14 12:24:18,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79720 conditions, 6933 events. 4294/6933 cut-off events. For 2144145/2144148 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43876 event pairs, 882 based on Foata normal form. 4/6872 useless extension candidates. Maximal degree in co-relation 79525. Up to 5907 conditions per place. [2024-06-14 12:24:18,813 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 375 selfloop transitions, 173 changer transitions 0/587 dead transitions. [2024-06-14 12:24:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 587 transitions, 9099 flow [2024-06-14 12:24:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:24:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:24:18,814 INFO L175 Difference]: Start difference. First operand has 397 places, 571 transitions, 7369 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:24:18,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 587 transitions, 9099 flow [2024-06-14 12:24:23,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 587 transitions, 8823 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:23,457 INFO L231 Difference]: Finished difference. Result has 397 places, 575 transitions, 7534 flow [2024-06-14 12:24:23,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7093, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7534, PETRI_PLACES=397, PETRI_TRANSITIONS=575} [2024-06-14 12:24:23,469 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 351 predicate places. [2024-06-14 12:24:23,470 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 575 transitions, 7534 flow [2024-06-14 12:24:23,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:23,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:23,470 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 12:24:23,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:24:23,470 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 12:24:23,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash -894210602, now seen corresponding path program 10 times [2024-06-14 12:24:23,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:23,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417676879] [2024-06-14 12:24:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:24,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:24,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417676879] [2024-06-14 12:24:24,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417676879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:24,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:24,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:24,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525125801] [2024-06-14 12:24:24,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:24,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:24,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:24,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:24,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:24,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:24,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 575 transitions, 7534 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:24,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:24,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:24,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:26,534 INFO L124 PetriNetUnfolderBase]: 4380/7068 cut-off events. [2024-06-14 12:24:26,534 INFO L125 PetriNetUnfolderBase]: For 2185294/2185297 co-relation queries the response was YES. [2024-06-14 12:24:26,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80988 conditions, 7068 events. 4380/7068 cut-off events. For 2185294/2185297 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44659 event pairs, 922 based on Foata normal form. 2/7050 useless extension candidates. Maximal degree in co-relation 80793. Up to 5992 conditions per place. [2024-06-14 12:24:26,646 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 420 selfloop transitions, 126 changer transitions 0/595 dead transitions. [2024-06-14 12:24:26,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 595 transitions, 9484 flow [2024-06-14 12:24:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:24:26,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:24:26,647 INFO L175 Difference]: Start difference. First operand has 397 places, 575 transitions, 7534 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:24:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 595 transitions, 9484 flow [2024-06-14 12:24:31,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 595 transitions, 9108 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:31,843 INFO L231 Difference]: Finished difference. Result has 400 places, 582 transitions, 7677 flow [2024-06-14 12:24:31,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7158, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7677, PETRI_PLACES=400, PETRI_TRANSITIONS=582} [2024-06-14 12:24:31,844 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 354 predicate places. [2024-06-14 12:24:31,844 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 582 transitions, 7677 flow [2024-06-14 12:24:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:31,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:31,844 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 12:24:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:24:31,844 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 12:24:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -42901094, now seen corresponding path program 8 times [2024-06-14 12:24:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132273450] [2024-06-14 12:24:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:32,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132273450] [2024-06-14 12:24:32,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132273450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:32,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:32,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:32,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722202871] [2024-06-14 12:24:32,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:32,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:32,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:32,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:32,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:32,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:32,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 582 transitions, 7677 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:32,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:32,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:32,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:34,710 INFO L124 PetriNetUnfolderBase]: 4314/6961 cut-off events. [2024-06-14 12:24:34,710 INFO L125 PetriNetUnfolderBase]: For 2216186/2216189 co-relation queries the response was YES. [2024-06-14 12:24:34,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80937 conditions, 6961 events. 4314/6961 cut-off events. For 2216186/2216189 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44047 event pairs, 882 based on Foata normal form. 4/6900 useless extension candidates. Maximal degree in co-relation 80741. Up to 5924 conditions per place. [2024-06-14 12:24:34,836 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 379 selfloop transitions, 180 changer transitions 0/600 dead transitions. [2024-06-14 12:24:34,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 600 transitions, 9503 flow [2024-06-14 12:24:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:24:34,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-14 12:24:34,838 INFO L175 Difference]: Start difference. First operand has 400 places, 582 transitions, 7677 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:24:34,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 600 transitions, 9503 flow [2024-06-14 12:24:40,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 600 transitions, 9135 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:40,463 INFO L231 Difference]: Finished difference. Result has 404 places, 588 transitions, 7849 flow [2024-06-14 12:24:40,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7309, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7849, PETRI_PLACES=404, PETRI_TRANSITIONS=588} [2024-06-14 12:24:40,464 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 358 predicate places. [2024-06-14 12:24:40,464 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 588 transitions, 7849 flow [2024-06-14 12:24:40,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:40,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:40,468 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 12:24:40,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:24:40,469 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 12:24:40,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1292544468, now seen corresponding path program 9 times [2024-06-14 12:24:40,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:40,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053665898] [2024-06-14 12:24:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:40,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:41,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:41,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053665898] [2024-06-14 12:24:41,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053665898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:41,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:41,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:41,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56468719] [2024-06-14 12:24:41,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:41,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:41,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 588 transitions, 7849 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:41,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:41,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:41,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:43,277 INFO L124 PetriNetUnfolderBase]: 4319/6970 cut-off events. [2024-06-14 12:24:43,277 INFO L125 PetriNetUnfolderBase]: For 2233978/2233981 co-relation queries the response was YES. [2024-06-14 12:24:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80963 conditions, 6970 events. 4319/6970 cut-off events. For 2233978/2233981 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44091 event pairs, 882 based on Foata normal form. 3/6908 useless extension candidates. Maximal degree in co-relation 80765. Up to 5928 conditions per place. [2024-06-14 12:24:43,408 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 351 selfloop transitions, 211 changer transitions 0/603 dead transitions. [2024-06-14 12:24:43,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 603 transitions, 9613 flow [2024-06-14 12:24:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:24:43,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-14 12:24:43,409 INFO L175 Difference]: Start difference. First operand has 404 places, 588 transitions, 7849 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:24:43,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 603 transitions, 9613 flow [2024-06-14 12:24:48,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 603 transitions, 9246 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:48,172 INFO L231 Difference]: Finished difference. Result has 408 places, 591 transitions, 7988 flow [2024-06-14 12:24:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7484, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7988, PETRI_PLACES=408, PETRI_TRANSITIONS=591} [2024-06-14 12:24:48,173 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 362 predicate places. [2024-06-14 12:24:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 591 transitions, 7988 flow [2024-06-14 12:24:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:48,173 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 12:24:48,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:24:48,173 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 12:24:48,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -541114454, now seen corresponding path program 11 times [2024-06-14 12:24:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398767100] [2024-06-14 12:24:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:49,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:49,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398767100] [2024-06-14 12:24:49,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398767100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:49,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:49,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813599562] [2024-06-14 12:24:49,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:49,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:49,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:49,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 591 transitions, 7988 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:49,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:49,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:50,983 INFO L124 PetriNetUnfolderBase]: 4398/7092 cut-off events. [2024-06-14 12:24:50,983 INFO L125 PetriNetUnfolderBase]: For 2275799/2275802 co-relation queries the response was YES. [2024-06-14 12:24:51,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82096 conditions, 7092 events. 4398/7092 cut-off events. For 2275799/2275802 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44779 event pairs, 921 based on Foata normal form. 1/7073 useless extension candidates. Maximal degree in co-relation 81897. Up to 6009 conditions per place. [2024-06-14 12:24:51,120 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 417 selfloop transitions, 140 changer transitions 0/609 dead transitions. [2024-06-14 12:24:51,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 609 transitions, 9912 flow [2024-06-14 12:24:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:24:51,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-14 12:24:51,122 INFO L175 Difference]: Start difference. First operand has 408 places, 591 transitions, 7988 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:24:51,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 609 transitions, 9912 flow [2024-06-14 12:24:56,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 609 transitions, 9514 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:56,008 INFO L231 Difference]: Finished difference. Result has 411 places, 597 transitions, 8122 flow [2024-06-14 12:24:56,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8122, PETRI_PLACES=411, PETRI_TRANSITIONS=597} [2024-06-14 12:24:56,008 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 365 predicate places. [2024-06-14 12:24:56,009 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 597 transitions, 8122 flow [2024-06-14 12:24:56,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:56,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:56,009 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 12:24:56,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:24:56,009 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 12:24:56,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -717078834, now seen corresponding path program 10 times [2024-06-14 12:24:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807699413] [2024-06-14 12:24:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:57,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807699413] [2024-06-14 12:24:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807699413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:57,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:57,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821371720] [2024-06-14 12:24:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:57,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:57,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:57,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:57,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:24:57,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 597 transitions, 8122 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:57,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:57,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:24:57,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:58,931 INFO L124 PetriNetUnfolderBase]: 4319/6969 cut-off events. [2024-06-14 12:24:58,932 INFO L125 PetriNetUnfolderBase]: For 2291150/2291153 co-relation queries the response was YES. [2024-06-14 12:24:59,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81306 conditions, 6969 events. 4319/6969 cut-off events. For 2291150/2291153 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44117 event pairs, 882 based on Foata normal form. 3/6907 useless extension candidates. Maximal degree in co-relation 81107. Up to 5928 conditions per place. [2024-06-14 12:24:59,055 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 355 selfloop transitions, 211 changer transitions 0/609 dead transitions. [2024-06-14 12:24:59,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 609 transitions, 9824 flow [2024-06-14 12:24:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:24:59,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-14 12:24:59,056 INFO L175 Difference]: Start difference. First operand has 411 places, 597 transitions, 8122 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:24:59,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 609 transitions, 9824 flow [2024-06-14 12:25:04,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 609 transitions, 9569 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-14 12:25:04,538 INFO L231 Difference]: Finished difference. Result has 417 places, 597 transitions, 8295 flow [2024-06-14 12:25:04,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7867, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8295, PETRI_PLACES=417, PETRI_TRANSITIONS=597} [2024-06-14 12:25:04,539 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 371 predicate places. [2024-06-14 12:25:04,539 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 597 transitions, 8295 flow [2024-06-14 12:25:04,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:04,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:04,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:25:04,540 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 12:25:04,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash -532595406, now seen corresponding path program 11 times [2024-06-14 12:25:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:04,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553337985] [2024-06-14 12:25:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:05,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553337985] [2024-06-14 12:25:05,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553337985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:05,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:05,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:05,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625967341] [2024-06-14 12:25:05,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:05,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:05,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:05,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:05,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 597 transitions, 8295 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:05,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:05,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:05,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:07,440 INFO L124 PetriNetUnfolderBase]: 4316/6965 cut-off events. [2024-06-14 12:25:07,441 INFO L125 PetriNetUnfolderBase]: For 2313229/2313232 co-relation queries the response was YES. [2024-06-14 12:25:07,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81807 conditions, 6965 events. 4316/6965 cut-off events. For 2313229/2313232 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44083 event pairs, 882 based on Foata normal form. 3/6903 useless extension candidates. Maximal degree in co-relation 81606. Up to 5926 conditions per place. [2024-06-14 12:25:07,567 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 355 selfloop transitions, 210 changer transitions 0/608 dead transitions. [2024-06-14 12:25:07,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 608 transitions, 9725 flow [2024-06-14 12:25:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:25:07,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:25:07,568 INFO L175 Difference]: Start difference. First operand has 417 places, 597 transitions, 8295 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:25:07,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 608 transitions, 9725 flow [2024-06-14 12:25:12,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 608 transitions, 9085 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-06-14 12:25:12,235 INFO L231 Difference]: Finished difference. Result has 413 places, 597 transitions, 8081 flow [2024-06-14 12:25:12,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8081, PETRI_PLACES=413, PETRI_TRANSITIONS=597} [2024-06-14 12:25:12,235 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 367 predicate places. [2024-06-14 12:25:12,235 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 597 transitions, 8081 flow [2024-06-14 12:25:12,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:12,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:12,236 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 12:25:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:25:12,236 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 12:25:12,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -437217654, now seen corresponding path program 12 times [2024-06-14 12:25:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:12,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386892289] [2024-06-14 12:25:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:13,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:13,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386892289] [2024-06-14 12:25:13,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386892289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:13,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:13,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685175568] [2024-06-14 12:25:13,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:13,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:13,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 597 transitions, 8081 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:13,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:13,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:13,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:15,073 INFO L124 PetriNetUnfolderBase]: 4308/6955 cut-off events. [2024-06-14 12:25:15,073 INFO L125 PetriNetUnfolderBase]: For 2333150/2333153 co-relation queries the response was YES. [2024-06-14 12:25:15,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81543 conditions, 6955 events. 4308/6955 cut-off events. For 2333150/2333153 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44069 event pairs, 883 based on Foata normal form. 4/6894 useless extension candidates. Maximal degree in co-relation 81342. Up to 5918 conditions per place. [2024-06-14 12:25:15,235 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 369 selfloop transitions, 195 changer transitions 0/607 dead transitions. [2024-06-14 12:25:15,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 607 transitions, 9235 flow [2024-06-14 12:25:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:25:15,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:25:15,236 INFO L175 Difference]: Start difference. First operand has 413 places, 597 transitions, 8081 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:25:15,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 607 transitions, 9235 flow [2024-06-14 12:25:19,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 607 transitions, 8729 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:19,472 INFO L231 Difference]: Finished difference. Result has 414 places, 597 transitions, 7973 flow [2024-06-14 12:25:19,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7575, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7973, PETRI_PLACES=414, PETRI_TRANSITIONS=597} [2024-06-14 12:25:19,473 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 368 predicate places. [2024-06-14 12:25:19,473 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 597 transitions, 7973 flow [2024-06-14 12:25:19,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:19,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:19,473 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 12:25:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:25:19,473 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 12:25:19,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1292306140, now seen corresponding path program 12 times [2024-06-14 12:25:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002023895] [2024-06-14 12:25:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:20,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:20,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002023895] [2024-06-14 12:25:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002023895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:20,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:20,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590481764] [2024-06-14 12:25:20,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:20,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:20,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:20,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:20,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 597 transitions, 7973 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:20,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:20,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:20,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:22,734 INFO L124 PetriNetUnfolderBase]: 4379/7064 cut-off events. [2024-06-14 12:25:22,734 INFO L125 PetriNetUnfolderBase]: For 2358252/2358255 co-relation queries the response was YES. [2024-06-14 12:25:22,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82217 conditions, 7064 events. 4379/7064 cut-off events. For 2358252/2358255 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44619 event pairs, 921 based on Foata normal form. 1/7045 useless extension candidates. Maximal degree in co-relation 82015. Up to 5991 conditions per place. [2024-06-14 12:25:22,872 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 412 selfloop transitions, 144 changer transitions 0/608 dead transitions. [2024-06-14 12:25:22,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 608 transitions, 9389 flow [2024-06-14 12:25:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:25:22,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-14 12:25:22,874 INFO L175 Difference]: Start difference. First operand has 414 places, 597 transitions, 7973 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:25:22,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 608 transitions, 9389 flow [2024-06-14 12:25:28,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 608 transitions, 8838 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-14 12:25:28,438 INFO L231 Difference]: Finished difference. Result has 413 places, 597 transitions, 7716 flow [2024-06-14 12:25:28,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7716, PETRI_PLACES=413, PETRI_TRANSITIONS=597} [2024-06-14 12:25:28,438 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 367 predicate places. [2024-06-14 12:25:28,439 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 597 transitions, 7716 flow [2024-06-14 12:25:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:28,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:28,439 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 12:25:28,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:25:28,439 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:28,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1986356207, now seen corresponding path program 2 times [2024-06-14 12:25:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646865458] [2024-06-14 12:25:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:29,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:29,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646865458] [2024-06-14 12:25:29,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646865458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:29,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:29,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:25:29,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005520714] [2024-06-14 12:25:29,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:29,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:25:29,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:25:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:25:29,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:29,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 597 transitions, 7716 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:29,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:29,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:29,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:31,939 INFO L124 PetriNetUnfolderBase]: 4503/7297 cut-off events. [2024-06-14 12:25:31,939 INFO L125 PetriNetUnfolderBase]: For 2449648/2449651 co-relation queries the response was YES. [2024-06-14 12:25:32,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83308 conditions, 7297 events. 4503/7297 cut-off events. For 2449648/2449651 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46604 event pairs, 899 based on Foata normal form. 14/7294 useless extension candidates. Maximal degree in co-relation 83105. Up to 5939 conditions per place. [2024-06-14 12:25:32,075 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 490 selfloop transitions, 101 changer transitions 0/643 dead transitions. [2024-06-14 12:25:32,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 643 transitions, 9182 flow [2024-06-14 12:25:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 12:25:32,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46444444444444444 [2024-06-14 12:25:32,076 INFO L175 Difference]: Start difference. First operand has 413 places, 597 transitions, 7716 flow. Second operand 10 states and 209 transitions. [2024-06-14 12:25:32,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 643 transitions, 9182 flow [2024-06-14 12:25:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 643 transitions, 8886 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:37,459 INFO L231 Difference]: Finished difference. Result has 418 places, 605 transitions, 7768 flow [2024-06-14 12:25:37,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7768, PETRI_PLACES=418, PETRI_TRANSITIONS=605} [2024-06-14 12:25:37,459 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 372 predicate places. [2024-06-14 12:25:37,459 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 605 transitions, 7768 flow [2024-06-14 12:25:37,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:37,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:37,460 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 12:25:37,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:25:37,460 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:37,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:37,461 INFO L85 PathProgramCache]: Analyzing trace with hash -376595473, now seen corresponding path program 3 times [2024-06-14 12:25:37,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:37,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014948032] [2024-06-14 12:25:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:38,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:38,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014948032] [2024-06-14 12:25:38,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014948032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:38,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:38,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:25:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609056098] [2024-06-14 12:25:38,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:38,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:25:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:25:38,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:25:38,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:38,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 605 transitions, 7768 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:38,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:38,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:38,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:41,388 INFO L124 PetriNetUnfolderBase]: 4615/7501 cut-off events. [2024-06-14 12:25:41,388 INFO L125 PetriNetUnfolderBase]: For 2487746/2487749 co-relation queries the response was YES. [2024-06-14 12:25:41,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85133 conditions, 7501 events. 4615/7501 cut-off events. For 2487746/2487749 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 48496 event pairs, 925 based on Foata normal form. 14/7498 useless extension candidates. Maximal degree in co-relation 84927. Up to 6214 conditions per place. [2024-06-14 12:25:41,528 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 484 selfloop transitions, 114 changer transitions 0/650 dead transitions. [2024-06-14 12:25:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 650 transitions, 9250 flow [2024-06-14 12:25:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:25:41,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:25:41,530 INFO L175 Difference]: Start difference. First operand has 418 places, 605 transitions, 7768 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:25:41,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 650 transitions, 9250 flow [2024-06-14 12:25:46,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 650 transitions, 9032 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:25:47,003 INFO L231 Difference]: Finished difference. Result has 425 places, 613 transitions, 7951 flow [2024-06-14 12:25:47,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7951, PETRI_PLACES=425, PETRI_TRANSITIONS=613} [2024-06-14 12:25:47,004 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 379 predicate places. [2024-06-14 12:25:47,004 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 613 transitions, 7951 flow [2024-06-14 12:25:47,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:47,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:47,004 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 12:25:47,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:25:47,005 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:47,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash 334029723, now seen corresponding path program 4 times [2024-06-14 12:25:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:47,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872922052] [2024-06-14 12:25:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:47,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:48,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:48,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872922052] [2024-06-14 12:25:48,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872922052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:48,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:48,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:25:48,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169771098] [2024-06-14 12:25:48,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:48,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:25:48,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:25:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:25:48,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:48,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 613 transitions, 7951 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:48,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:48,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:48,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:51,094 INFO L124 PetriNetUnfolderBase]: 4636/7550 cut-off events. [2024-06-14 12:25:51,095 INFO L125 PetriNetUnfolderBase]: For 2454620/2454623 co-relation queries the response was YES. [2024-06-14 12:25:51,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84669 conditions, 7550 events. 4636/7550 cut-off events. For 2454620/2454623 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48903 event pairs, 784 based on Foata normal form. 14/7547 useless extension candidates. Maximal degree in co-relation 84460. Up to 5184 conditions per place. [2024-06-14 12:25:51,245 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 471 selfloop transitions, 130 changer transitions 0/653 dead transitions. [2024-06-14 12:25:51,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 653 transitions, 9620 flow [2024-06-14 12:25:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 12:25:51,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622222222222222 [2024-06-14 12:25:51,247 INFO L175 Difference]: Start difference. First operand has 425 places, 613 transitions, 7951 flow. Second operand 10 states and 208 transitions. [2024-06-14 12:25:51,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 653 transitions, 9620 flow [2024-06-14 12:25:56,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 653 transitions, 9435 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:56,070 INFO L231 Difference]: Finished difference. Result has 432 places, 614 transitions, 8090 flow [2024-06-14 12:25:56,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8090, PETRI_PLACES=432, PETRI_TRANSITIONS=614} [2024-06-14 12:25:56,070 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 386 predicate places. [2024-06-14 12:25:56,070 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 614 transitions, 8090 flow [2024-06-14 12:25:56,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:56,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:56,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:56,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:25:56,071 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:56,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -624756851, now seen corresponding path program 5 times [2024-06-14 12:25:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:56,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933772063] [2024-06-14 12:25:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:57,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:57,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933772063] [2024-06-14 12:25:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933772063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:57,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:57,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:25:57,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147193667] [2024-06-14 12:25:57,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:25:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:25:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:25:57,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:25:57,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 614 transitions, 8090 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:57,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:57,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:25:57,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:59,730 INFO L124 PetriNetUnfolderBase]: 4616/7518 cut-off events. [2024-06-14 12:25:59,730 INFO L125 PetriNetUnfolderBase]: For 2416046/2416049 co-relation queries the response was YES. [2024-06-14 12:25:59,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83081 conditions, 7518 events. 4616/7518 cut-off events. For 2416046/2416049 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48755 event pairs, 912 based on Foata normal form. 14/7515 useless extension candidates. Maximal degree in co-relation 82870. Up to 6221 conditions per place. [2024-06-14 12:25:59,865 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 489 selfloop transitions, 109 changer transitions 0/650 dead transitions. [2024-06-14 12:25:59,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 650 transitions, 9332 flow [2024-06-14 12:25:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:25:59,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-14 12:25:59,867 INFO L175 Difference]: Start difference. First operand has 432 places, 614 transitions, 8090 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:25:59,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 650 transitions, 9332 flow [2024-06-14 12:26:05,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 650 transitions, 8986 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:26:05,454 INFO L231 Difference]: Finished difference. Result has 433 places, 613 transitions, 7848 flow [2024-06-14 12:26:05,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7848, PETRI_PLACES=433, PETRI_TRANSITIONS=613} [2024-06-14 12:26:05,454 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 387 predicate places. [2024-06-14 12:26:05,454 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 613 transitions, 7848 flow [2024-06-14 12:26:05,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:05,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:05,455 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 12:26:05,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:26:05,455 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 12:26:05,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1114814338, now seen corresponding path program 4 times [2024-06-14 12:26:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029055896] [2024-06-14 12:26:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:06,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029055896] [2024-06-14 12:26:06,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029055896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:06,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:06,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881150029] [2024-06-14 12:26:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:06,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:26:06,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 613 transitions, 7848 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:06,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:06,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:26:06,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:08,655 INFO L124 PetriNetUnfolderBase]: 4466/7336 cut-off events. [2024-06-14 12:26:08,655 INFO L125 PetriNetUnfolderBase]: For 2417350/2417353 co-relation queries the response was YES. [2024-06-14 12:26:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81566 conditions, 7336 events. 4466/7336 cut-off events. For 2417350/2417353 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48211 event pairs, 894 based on Foata normal form. 6/7277 useless extension candidates. Maximal degree in co-relation 81355. Up to 6253 conditions per place. [2024-06-14 12:26:08,807 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 436 selfloop transitions, 101 changer transitions 0/627 dead transitions. [2024-06-14 12:26:08,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 627 transitions, 9100 flow [2024-06-14 12:26:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:26:08,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:26:08,809 INFO L175 Difference]: Start difference. First operand has 433 places, 613 transitions, 7848 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:26:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 627 transitions, 9100 flow [2024-06-14 12:26:14,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 627 transitions, 8615 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-14 12:26:14,667 INFO L231 Difference]: Finished difference. Result has 429 places, 616 transitions, 7727 flow [2024-06-14 12:26:14,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7363, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7727, PETRI_PLACES=429, PETRI_TRANSITIONS=616} [2024-06-14 12:26:14,668 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 383 predicate places. [2024-06-14 12:26:14,668 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 616 transitions, 7727 flow [2024-06-14 12:26:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:14,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:14,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:26:14,669 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 12:26:14,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1115245300, now seen corresponding path program 2 times [2024-06-14 12:26:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159998635] [2024-06-14 12:26:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:15,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159998635] [2024-06-14 12:26:15,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159998635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:15,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:15,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:15,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140683946] [2024-06-14 12:26:15,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:15,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:15,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:15,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:26:15,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 616 transitions, 7727 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:15,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:15,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:26:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:17,833 INFO L124 PetriNetUnfolderBase]: 4560/7432 cut-off events. [2024-06-14 12:26:17,833 INFO L125 PetriNetUnfolderBase]: For 2412437/2412446 co-relation queries the response was YES. [2024-06-14 12:26:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81435 conditions, 7432 events. 4560/7432 cut-off events. For 2412437/2412446 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 48325 event pairs, 878 based on Foata normal form. 7/7383 useless extension candidates. Maximal degree in co-relation 81227. Up to 6781 conditions per place. [2024-06-14 12:26:17,978 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 538 selfloop transitions, 54 changer transitions 0/635 dead transitions. [2024-06-14 12:26:17,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 635 transitions, 9502 flow [2024-06-14 12:26:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:26:17,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123456790123457 [2024-06-14 12:26:17,979 INFO L175 Difference]: Start difference. First operand has 429 places, 616 transitions, 7727 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:26:17,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 635 transitions, 9502 flow [2024-06-14 12:26:23,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 635 transitions, 9160 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-14 12:26:23,021 INFO L231 Difference]: Finished difference. Result has 432 places, 622 transitions, 7773 flow [2024-06-14 12:26:23,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7385, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7773, PETRI_PLACES=432, PETRI_TRANSITIONS=622} [2024-06-14 12:26:23,022 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 386 predicate places. [2024-06-14 12:26:23,022 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 622 transitions, 7773 flow [2024-06-14 12:26:23,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:23,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:23,022 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 12:26:23,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:26:23,023 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 12:26:23,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1115244804, now seen corresponding path program 5 times [2024-06-14 12:26:23,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:23,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805089386] [2024-06-14 12:26:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:23,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:24,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:24,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805089386] [2024-06-14 12:26:24,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805089386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:24,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:24,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:24,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021925548] [2024-06-14 12:26:24,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:24,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:24,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:24,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:26:24,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 622 transitions, 7773 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:24,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:24,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:26:24,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:26,251 INFO L124 PetriNetUnfolderBase]: 4596/7487 cut-off events. [2024-06-14 12:26:26,251 INFO L125 PetriNetUnfolderBase]: For 2485889/2485892 co-relation queries the response was YES. [2024-06-14 12:26:26,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82548 conditions, 7487 events. 4596/7487 cut-off events. For 2485889/2485892 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48761 event pairs, 920 based on Foata normal form. 4/7426 useless extension candidates. Maximal degree in co-relation 82339. Up to 6180 conditions per place. [2024-06-14 12:26:26,377 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 433 selfloop transitions, 184 changer transitions 0/660 dead transitions. [2024-06-14 12:26:26,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 660 transitions, 10585 flow [2024-06-14 12:26:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:26:26,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-06-14 12:26:26,378 INFO L175 Difference]: Start difference. First operand has 432 places, 622 transitions, 7773 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:26:26,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 660 transitions, 10585 flow [2024-06-14 12:26:31,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 660 transitions, 10395 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:31,544 INFO L231 Difference]: Finished difference. Result has 438 places, 642 transitions, 8521 flow [2024-06-14 12:26:31,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7583, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8521, PETRI_PLACES=438, PETRI_TRANSITIONS=642} [2024-06-14 12:26:31,545 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 392 predicate places. [2024-06-14 12:26:31,545 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 642 transitions, 8521 flow [2024-06-14 12:26:31,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:31,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:31,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:26:31,545 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 12:26:31,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -421536242, now seen corresponding path program 3 times [2024-06-14 12:26:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689710850] [2024-06-14 12:26:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:32,657 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 12:26:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:32,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689710850] [2024-06-14 12:26:32,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689710850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:32,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:32,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:32,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436528504] [2024-06-14 12:26:32,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:32,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:32,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:32,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:26:32,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 642 transitions, 8521 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:32,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:32,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:26:32,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:34,862 INFO L124 PetriNetUnfolderBase]: 4601/7491 cut-off events. [2024-06-14 12:26:34,862 INFO L125 PetriNetUnfolderBase]: For 2523703/2523703 co-relation queries the response was YES. [2024-06-14 12:26:34,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84339 conditions, 7491 events. 4601/7491 cut-off events. For 2523703/2523703 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48843 event pairs, 962 based on Foata normal form. 1/7441 useless extension candidates. Maximal degree in co-relation 84126. Up to 6914 conditions per place. [2024-06-14 12:26:35,006 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 592 selfloop transitions, 21 changer transitions 0/656 dead transitions. [2024-06-14 12:26:35,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 656 transitions, 9899 flow [2024-06-14 12:26:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:26:35,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39012345679012345 [2024-06-14 12:26:35,007 INFO L175 Difference]: Start difference. First operand has 438 places, 642 transitions, 8521 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:26:35,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 656 transitions, 9899 flow [2024-06-14 12:26:42,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 656 transitions, 9637 flow, removed 104 selfloop flow, removed 3 redundant places. [2024-06-14 12:26:42,104 INFO L231 Difference]: Finished difference. Result has 444 places, 645 transitions, 8437 flow [2024-06-14 12:26:42,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8437, PETRI_PLACES=444, PETRI_TRANSITIONS=645} [2024-06-14 12:26:42,105 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 398 predicate places. [2024-06-14 12:26:42,105 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 645 transitions, 8437 flow [2024-06-14 12:26:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:42,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:42,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:26:42,105 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 12:26:42,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash -893917218, now seen corresponding path program 6 times [2024-06-14 12:26:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993311366] [2024-06-14 12:26:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:43,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:43,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993311366] [2024-06-14 12:26:43,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993311366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:43,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:43,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578518444] [2024-06-14 12:26:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:43,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:43,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:26:43,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 645 transitions, 8437 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:43,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:43,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:26:43,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:45,581 INFO L124 PetriNetUnfolderBase]: 4611/7506 cut-off events. [2024-06-14 12:26:45,581 INFO L125 PetriNetUnfolderBase]: For 2559698/2559701 co-relation queries the response was YES. [2024-06-14 12:26:45,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83992 conditions, 7506 events. 4611/7506 cut-off events. For 2559698/2559701 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 48838 event pairs, 919 based on Foata normal form. 4/7445 useless extension candidates. Maximal degree in co-relation 83777. Up to 6197 conditions per place. [2024-06-14 12:26:45,713 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 436 selfloop transitions, 188 changer transitions 0/667 dead transitions. [2024-06-14 12:26:45,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 667 transitions, 11004 flow [2024-06-14 12:26:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:26:45,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419753086419753 [2024-06-14 12:26:45,714 INFO L175 Difference]: Start difference. First operand has 444 places, 645 transitions, 8437 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:26:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 667 transitions, 11004 flow [2024-06-14 12:26:52,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 667 transitions, 10854 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:52,247 INFO L231 Difference]: Finished difference. Result has 446 places, 649 transitions, 8799 flow [2024-06-14 12:26:52,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8287, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8799, PETRI_PLACES=446, PETRI_TRANSITIONS=649} [2024-06-14 12:26:52,248 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 400 predicate places. [2024-06-14 12:26:52,248 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 649 transitions, 8799 flow [2024-06-14 12:26:52,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:52,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:52,248 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 12:26:52,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:26:52,248 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 12:26:52,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash -894320838, now seen corresponding path program 7 times [2024-06-14 12:26:52,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:52,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318144581] [2024-06-14 12:26:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:53,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:53,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318144581] [2024-06-14 12:26:53,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318144581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:53,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:53,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:53,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974716935] [2024-06-14 12:26:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:53,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:53,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:53,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:26:53,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 649 transitions, 8799 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:53,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:53,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:26:53,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:55,565 INFO L124 PetriNetUnfolderBase]: 4621/7520 cut-off events. [2024-06-14 12:26:55,565 INFO L125 PetriNetUnfolderBase]: For 2592311/2592314 co-relation queries the response was YES. [2024-06-14 12:26:55,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84898 conditions, 7520 events. 4621/7520 cut-off events. For 2592311/2592314 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 48954 event pairs, 919 based on Foata normal form. 4/7459 useless extension candidates. Maximal degree in co-relation 84682. Up to 6210 conditions per place. [2024-06-14 12:26:55,726 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 423 selfloop transitions, 207 changer transitions 0/673 dead transitions. [2024-06-14 12:26:55,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 673 transitions, 11392 flow [2024-06-14 12:26:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:26:55,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-06-14 12:26:55,727 INFO L175 Difference]: Start difference. First operand has 446 places, 649 transitions, 8799 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:26:55,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 673 transitions, 11392 flow [2024-06-14 12:27:02,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 673 transitions, 10929 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:02,380 INFO L231 Difference]: Finished difference. Result has 451 places, 658 transitions, 9204 flow [2024-06-14 12:27:02,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8345, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9204, PETRI_PLACES=451, PETRI_TRANSITIONS=658} [2024-06-14 12:27:02,381 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 405 predicate places. [2024-06-14 12:27:02,381 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 658 transitions, 9204 flow [2024-06-14 12:27:02,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:02,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:02,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:27:02,382 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 12:27:02,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash -421552548, now seen corresponding path program 8 times [2024-06-14 12:27:02,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:02,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124302310] [2024-06-14 12:27:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124302310] [2024-06-14 12:27:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124302310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:03,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429326001] [2024-06-14 12:27:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:03,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:27:03,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 658 transitions, 9204 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:03,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:03,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:27:03,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:05,784 INFO L124 PetriNetUnfolderBase]: 4649/7562 cut-off events. [2024-06-14 12:27:05,784 INFO L125 PetriNetUnfolderBase]: For 2653266/2653269 co-relation queries the response was YES. [2024-06-14 12:27:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86376 conditions, 7562 events. 4649/7562 cut-off events. For 2653266/2653269 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49239 event pairs, 914 based on Foata normal form. 4/7501 useless extension candidates. Maximal degree in co-relation 86157. Up to 6238 conditions per place. [2024-06-14 12:27:05,934 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 389 selfloop transitions, 248 changer transitions 0/680 dead transitions. [2024-06-14 12:27:05,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 680 transitions, 11468 flow [2024-06-14 12:27:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:27:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:27:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:27:05,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-14 12:27:05,935 INFO L175 Difference]: Start difference. First operand has 451 places, 658 transitions, 9204 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:27:05,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 680 transitions, 11468 flow [2024-06-14 12:27:12,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 680 transitions, 11009 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:13,002 INFO L231 Difference]: Finished difference. Result has 457 places, 666 transitions, 9549 flow [2024-06-14 12:27:13,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9549, PETRI_PLACES=457, PETRI_TRANSITIONS=666} [2024-06-14 12:27:13,003 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 411 predicate places. [2024-06-14 12:27:13,003 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 666 transitions, 9549 flow [2024-06-14 12:27:13,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:13,004 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 12:27:13,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:27:13,004 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 12:27:13,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash -437221188, now seen corresponding path program 9 times [2024-06-14 12:27:13,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:13,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506217505] [2024-06-14 12:27:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:14,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506217505] [2024-06-14 12:27:14,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506217505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:14,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:14,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262292100] [2024-06-14 12:27:14,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:14,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:14,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:14,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:27:14,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 666 transitions, 9549 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:14,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:14,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:27:14,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:16,444 INFO L124 PetriNetUnfolderBase]: 4659/7580 cut-off events. [2024-06-14 12:27:16,445 INFO L125 PetriNetUnfolderBase]: For 2683832/2683835 co-relation queries the response was YES. [2024-06-14 12:27:16,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86892 conditions, 7580 events. 4659/7580 cut-off events. For 2683832/2683835 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 49417 event pairs, 919 based on Foata normal form. 4/7519 useless extension candidates. Maximal degree in co-relation 86671. Up to 6248 conditions per place. [2024-06-14 12:27:16,586 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 419 selfloop transitions, 223 changer transitions 0/685 dead transitions. [2024-06-14 12:27:16,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 685 transitions, 11989 flow [2024-06-14 12:27:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:27:16,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-14 12:27:16,588 INFO L175 Difference]: Start difference. First operand has 457 places, 666 transitions, 9549 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:27:16,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 685 transitions, 11989 flow [2024-06-14 12:27:23,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 685 transitions, 11427 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:23,407 INFO L231 Difference]: Finished difference. Result has 460 places, 670 transitions, 9586 flow [2024-06-14 12:27:23,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9002, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9586, PETRI_PLACES=460, PETRI_TRANSITIONS=670} [2024-06-14 12:27:23,407 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 414 predicate places. [2024-06-14 12:27:23,407 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 670 transitions, 9586 flow [2024-06-14 12:27:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:23,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:23,408 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 12:27:23,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:27:23,408 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 12:27:23,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -421552052, now seen corresponding path program 4 times [2024-06-14 12:27:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:23,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670865292] [2024-06-14 12:27:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:24,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670865292] [2024-06-14 12:27:24,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670865292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:24,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:24,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:24,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174945283] [2024-06-14 12:27:24,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:24,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:24,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:24,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:27:24,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 670 transitions, 9586 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:24,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:24,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:27:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:26,719 INFO L124 PetriNetUnfolderBase]: 4664/7589 cut-off events. [2024-06-14 12:27:26,720 INFO L125 PetriNetUnfolderBase]: For 2708665/2708674 co-relation queries the response was YES. [2024-06-14 12:27:26,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86997 conditions, 7589 events. 4664/7589 cut-off events. For 2708665/2708674 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49419 event pairs, 880 based on Foata normal form. 7/7540 useless extension candidates. Maximal degree in co-relation 86775. Up to 6924 conditions per place. [2024-06-14 12:27:26,868 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 576 selfloop transitions, 67 changer transitions 0/686 dead transitions. [2024-06-14 12:27:26,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 686 transitions, 11339 flow [2024-06-14 12:27:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:27:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:27:26,869 INFO L175 Difference]: Start difference. First operand has 460 places, 670 transitions, 9586 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:27:26,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 686 transitions, 11339 flow [2024-06-14 12:27:32,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 686 transitions, 10867 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:32,177 INFO L231 Difference]: Finished difference. Result has 463 places, 673 transitions, 9384 flow [2024-06-14 12:27:32,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9384, PETRI_PLACES=463, PETRI_TRANSITIONS=673} [2024-06-14 12:27:32,177 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 417 predicate places. [2024-06-14 12:27:32,177 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 673 transitions, 9384 flow [2024-06-14 12:27:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:32,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:32,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:27:32,178 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 12:27:32,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash -437207238, now seen corresponding path program 10 times [2024-06-14 12:27:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851979018] [2024-06-14 12:27:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:32,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:33,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:33,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851979018] [2024-06-14 12:27:33,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851979018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:33,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305908032] [2024-06-14 12:27:33,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:33,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:33,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:27:33,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 673 transitions, 9384 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:33,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:33,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:27:33,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:35,665 INFO L124 PetriNetUnfolderBase]: 4660/7583 cut-off events. [2024-06-14 12:27:35,666 INFO L125 PetriNetUnfolderBase]: For 2733568/2733571 co-relation queries the response was YES. [2024-06-14 12:27:35,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86247 conditions, 7583 events. 4660/7583 cut-off events. For 2733568/2733571 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49423 event pairs, 919 based on Foata normal form. 4/7522 useless extension candidates. Maximal degree in co-relation 86024. Up to 6253 conditions per place. [2024-06-14 12:27:35,796 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 427 selfloop transitions, 218 changer transitions 0/688 dead transitions. [2024-06-14 12:27:35,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 688 transitions, 11696 flow [2024-06-14 12:27:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:27:35,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-14 12:27:35,797 INFO L175 Difference]: Start difference. First operand has 463 places, 673 transitions, 9384 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:27:35,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 688 transitions, 11696 flow [2024-06-14 12:27:42,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 688 transitions, 11368 flow, removed 112 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:42,788 INFO L231 Difference]: Finished difference. Result has 466 places, 673 transitions, 9500 flow [2024-06-14 12:27:42,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9056, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9500, PETRI_PLACES=466, PETRI_TRANSITIONS=673} [2024-06-14 12:27:42,788 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 420 predicate places. [2024-06-14 12:27:42,788 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 673 transitions, 9500 flow [2024-06-14 12:27:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:42,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:42,789 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 12:27:42,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:27:42,789 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 12:27:42,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash 44548542, now seen corresponding path program 5 times [2024-06-14 12:27:42,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:42,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236409727] [2024-06-14 12:27:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:42,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:43,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:43,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236409727] [2024-06-14 12:27:43,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236409727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:43,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:43,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:43,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112595887] [2024-06-14 12:27:43,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:43,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:44,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:27:44,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 673 transitions, 9500 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:44,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:44,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:27:44,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:46,088 INFO L124 PetriNetUnfolderBase]: 4657/7581 cut-off events. [2024-06-14 12:27:46,088 INFO L125 PetriNetUnfolderBase]: For 2745524/2745533 co-relation queries the response was YES. [2024-06-14 12:27:46,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86579 conditions, 7581 events. 4657/7581 cut-off events. For 2745524/2745533 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49425 event pairs, 878 based on Foata normal form. 7/7532 useless extension candidates. Maximal degree in co-relation 86355. Up to 6916 conditions per place. [2024-06-14 12:27:46,237 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 579 selfloop transitions, 63 changer transitions 0/685 dead transitions. [2024-06-14 12:27:46,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 685 transitions, 10817 flow [2024-06-14 12:27:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:27:46,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:27:46,238 INFO L175 Difference]: Start difference. First operand has 466 places, 673 transitions, 9500 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:27:46,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 685 transitions, 10817 flow [2024-06-14 12:27:52,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 685 transitions, 10174 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-06-14 12:27:52,463 INFO L231 Difference]: Finished difference. Result has 465 places, 673 transitions, 8989 flow [2024-06-14 12:27:52,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8857, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8989, PETRI_PLACES=465, PETRI_TRANSITIONS=673} [2024-06-14 12:27:52,463 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 419 predicate places. [2024-06-14 12:27:52,464 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 673 transitions, 8989 flow [2024-06-14 12:27:52,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:52,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:52,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:52,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:27:52,464 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 12:27:52,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:52,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1908870570, now seen corresponding path program 5 times [2024-06-14 12:27:52,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:52,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704750454] [2024-06-14 12:27:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:52,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:53,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:53,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704750454] [2024-06-14 12:27:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704750454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:53,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:53,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963426796] [2024-06-14 12:27:53,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:53,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:53,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:27:53,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 673 transitions, 8989 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:53,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:53,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:27:53,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:55,967 INFO L124 PetriNetUnfolderBase]: 4656/7640 cut-off events. [2024-06-14 12:27:55,967 INFO L125 PetriNetUnfolderBase]: For 2822394/2822399 co-relation queries the response was YES. [2024-06-14 12:27:56,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86600 conditions, 7640 events. 4656/7640 cut-off events. For 2822394/2822399 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50442 event pairs, 855 based on Foata normal form. 8/7596 useless extension candidates. Maximal degree in co-relation 86378. Up to 6576 conditions per place. [2024-06-14 12:27:56,109 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 574 selfloop transitions, 61 changer transitions 0/725 dead transitions. [2024-06-14 12:27:56,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 725 transitions, 10768 flow [2024-06-14 12:27:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 12:27:56,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:27:56,111 INFO L175 Difference]: Start difference. First operand has 465 places, 673 transitions, 8989 flow. Second operand 9 states and 192 transitions. [2024-06-14 12:27:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 725 transitions, 10768 flow [2024-06-14 12:28:02,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 725 transitions, 10590 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 12:28:02,300 INFO L231 Difference]: Finished difference. Result has 468 places, 694 transitions, 9422 flow [2024-06-14 12:28:02,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8815, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9422, PETRI_PLACES=468, PETRI_TRANSITIONS=694} [2024-06-14 12:28:02,301 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 422 predicate places. [2024-06-14 12:28:02,301 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 694 transitions, 9422 flow [2024-06-14 12:28:02,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:02,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:02,301 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 12:28:02,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:28:02,301 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 12:28:02,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1981526266, now seen corresponding path program 6 times [2024-06-14 12:28:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774672090] [2024-06-14 12:28:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:03,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:03,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774672090] [2024-06-14 12:28:03,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774672090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:03,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:03,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547985217] [2024-06-14 12:28:03,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:03,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:03,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:03,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:28:03,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 694 transitions, 9422 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:03,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:28:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:06,006 INFO L124 PetriNetUnfolderBase]: 4773/7825 cut-off events. [2024-06-14 12:28:06,006 INFO L125 PetriNetUnfolderBase]: For 2845444/2845451 co-relation queries the response was YES. [2024-06-14 12:28:06,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89057 conditions, 7825 events. 4773/7825 cut-off events. For 2845444/2845451 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 51755 event pairs, 876 based on Foata normal form. 8/7781 useless extension candidates. Maximal degree in co-relation 88831. Up to 6738 conditions per place. [2024-06-14 12:28:06,369 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 581 selfloop transitions, 76 changer transitions 0/747 dead transitions. [2024-06-14 12:28:06,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 747 transitions, 11343 flow [2024-06-14 12:28:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:06,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:06,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 12:28:06,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765432098765432 [2024-06-14 12:28:06,396 INFO L175 Difference]: Start difference. First operand has 468 places, 694 transitions, 9422 flow. Second operand 9 states and 193 transitions. [2024-06-14 12:28:06,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 747 transitions, 11343 flow [2024-06-14 12:28:12,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 747 transitions, 10935 flow, removed 152 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:12,637 INFO L231 Difference]: Finished difference. Result has 474 places, 717 transitions, 9770 flow [2024-06-14 12:28:12,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9178, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9770, PETRI_PLACES=474, PETRI_TRANSITIONS=717} [2024-06-14 12:28:12,638 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 428 predicate places. [2024-06-14 12:28:12,638 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 717 transitions, 9770 flow [2024-06-14 12:28:12,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:12,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:12,638 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 12:28:12,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:28:12,638 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 12:28:12,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:12,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1764867224, now seen corresponding path program 7 times [2024-06-14 12:28:12,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:12,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372964404] [2024-06-14 12:28:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:12,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:13,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:13,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372964404] [2024-06-14 12:28:13,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372964404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:13,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:13,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:13,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161146895] [2024-06-14 12:28:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:13,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:13,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:13,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:13,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:28:13,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 717 transitions, 9770 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:13,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:13,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:28:13,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:16,421 INFO L124 PetriNetUnfolderBase]: 4782/7857 cut-off events. [2024-06-14 12:28:16,422 INFO L125 PetriNetUnfolderBase]: For 2936075/2936081 co-relation queries the response was YES. [2024-06-14 12:28:16,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89764 conditions, 7857 events. 4782/7857 cut-off events. For 2936075/2936081 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 52282 event pairs, 885 based on Foata normal form. 8/7810 useless extension candidates. Maximal degree in co-relation 89535. Up to 6856 conditions per place. [2024-06-14 12:28:16,565 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 592 selfloop transitions, 74 changer transitions 0/756 dead transitions. [2024-06-14 12:28:16,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 756 transitions, 11522 flow [2024-06-14 12:28:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 12:28:16,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:28:16,566 INFO L175 Difference]: Start difference. First operand has 474 places, 717 transitions, 9770 flow. Second operand 9 states and 189 transitions. [2024-06-14 12:28:16,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 756 transitions, 11522 flow [2024-06-14 12:28:23,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 756 transitions, 11239 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:23,112 INFO L231 Difference]: Finished difference. Result has 477 places, 731 transitions, 10026 flow [2024-06-14 12:28:23,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9487, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10026, PETRI_PLACES=477, PETRI_TRANSITIONS=731} [2024-06-14 12:28:23,113 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 431 predicate places. [2024-06-14 12:28:23,113 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 731 transitions, 10026 flow [2024-06-14 12:28:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:23,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:23,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:28:23,113 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 12:28:23,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -239963544, now seen corresponding path program 8 times [2024-06-14 12:28:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580289049] [2024-06-14 12:28:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:24,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:24,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580289049] [2024-06-14 12:28:24,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580289049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:24,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:24,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429371346] [2024-06-14 12:28:24,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:24,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:24,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:28:24,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 731 transitions, 10026 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:24,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:24,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:28:24,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:27,297 INFO L124 PetriNetUnfolderBase]: 4928/8068 cut-off events. [2024-06-14 12:28:27,297 INFO L125 PetriNetUnfolderBase]: For 2914772/2914777 co-relation queries the response was YES. [2024-06-14 12:28:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91467 conditions, 8068 events. 4928/8068 cut-off events. For 2914772/2914777 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 53525 event pairs, 708 based on Foata normal form. 6/8042 useless extension candidates. Maximal degree in co-relation 91237. Up to 6804 conditions per place. [2024-06-14 12:28:27,437 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 594 selfloop transitions, 96 changer transitions 0/780 dead transitions. [2024-06-14 12:28:27,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 780 transitions, 11810 flow [2024-06-14 12:28:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 12:28:27,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:28:27,439 INFO L175 Difference]: Start difference. First operand has 477 places, 731 transitions, 10026 flow. Second operand 9 states and 192 transitions. [2024-06-14 12:28:27,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 780 transitions, 11810 flow [2024-06-14 12:28:34,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 780 transitions, 11519 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:34,188 INFO L231 Difference]: Finished difference. Result has 481 places, 750 transitions, 10301 flow [2024-06-14 12:28:34,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9735, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10301, PETRI_PLACES=481, PETRI_TRANSITIONS=750} [2024-06-14 12:28:34,189 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 435 predicate places. [2024-06-14 12:28:34,189 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 750 transitions, 10301 flow [2024-06-14 12:28:34,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:34,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:34,189 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 12:28:34,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:28:34,189 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 12:28:34,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1764854328, now seen corresponding path program 11 times [2024-06-14 12:28:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494261263] [2024-06-14 12:28:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:35,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:35,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494261263] [2024-06-14 12:28:35,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494261263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:35,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:35,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:35,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180182547] [2024-06-14 12:28:35,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:35,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:35,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:35,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:28:35,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 750 transitions, 10301 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:35,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:35,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:28:35,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:38,159 INFO L124 PetriNetUnfolderBase]: 5066/8222 cut-off events. [2024-06-14 12:28:38,160 INFO L125 PetriNetUnfolderBase]: For 2941178/2941183 co-relation queries the response was YES. [2024-06-14 12:28:38,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93164 conditions, 8222 events. 5066/8222 cut-off events. For 2941178/2941183 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 54079 event pairs, 964 based on Foata normal form. 6/8176 useless extension candidates. Maximal degree in co-relation 92932. Up to 7413 conditions per place. [2024-06-14 12:28:38,457 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 664 selfloop transitions, 84 changer transitions 0/791 dead transitions. [2024-06-14 12:28:38,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 791 transitions, 12220 flow [2024-06-14 12:28:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:28:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:28:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:28:38,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43777777777777777 [2024-06-14 12:28:38,458 INFO L175 Difference]: Start difference. First operand has 481 places, 750 transitions, 10301 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:28:38,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 791 transitions, 12220 flow [2024-06-14 12:28:44,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 791 transitions, 11915 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:44,311 INFO L231 Difference]: Finished difference. Result has 485 places, 766 transitions, 10557 flow [2024-06-14 12:28:44,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=9996, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10557, PETRI_PLACES=485, PETRI_TRANSITIONS=766} [2024-06-14 12:28:44,311 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 439 predicate places. [2024-06-14 12:28:44,311 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 766 transitions, 10557 flow [2024-06-14 12:28:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:44,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:44,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:28:44,312 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 12:28:44,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash -300124104, now seen corresponding path program 9 times [2024-06-14 12:28:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649147892] [2024-06-14 12:28:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:45,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649147892] [2024-06-14 12:28:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649147892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:45,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:45,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745640409] [2024-06-14 12:28:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:45,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:45,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:28:45,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 766 transitions, 10557 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:45,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:45,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:28:45,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:48,178 INFO L124 PetriNetUnfolderBase]: 4996/8167 cut-off events. [2024-06-14 12:28:48,179 INFO L125 PetriNetUnfolderBase]: For 2982665/2982670 co-relation queries the response was YES. [2024-06-14 12:28:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92593 conditions, 8167 events. 4996/8167 cut-off events. For 2982665/2982670 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54204 event pairs, 921 based on Foata normal form. 8/8120 useless extension candidates. Maximal degree in co-relation 92360. Up to 7111 conditions per place. [2024-06-14 12:28:48,350 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 635 selfloop transitions, 75 changer transitions 0/802 dead transitions. [2024-06-14 12:28:48,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 802 transitions, 12355 flow [2024-06-14 12:28:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 12:28:48,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641975308641975 [2024-06-14 12:28:48,351 INFO L175 Difference]: Start difference. First operand has 485 places, 766 transitions, 10557 flow. Second operand 9 states and 188 transitions. [2024-06-14 12:28:48,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 802 transitions, 12355 flow [2024-06-14 12:28:57,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 802 transitions, 12118 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:57,701 INFO L231 Difference]: Finished difference. Result has 490 places, 778 transitions, 10817 flow [2024-06-14 12:28:57,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10322, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10817, PETRI_PLACES=490, PETRI_TRANSITIONS=778} [2024-06-14 12:28:57,702 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 444 predicate places. [2024-06-14 12:28:57,702 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 778 transitions, 10817 flow [2024-06-14 12:28:57,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:57,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:57,702 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 12:28:57,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:28:57,703 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 12:28:57,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 29977768, now seen corresponding path program 12 times [2024-06-14 12:28:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:57,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687848042] [2024-06-14 12:28:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:58,642 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 12:28:58,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687848042] [2024-06-14 12:28:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687848042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:58,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834833942] [2024-06-14 12:28:58,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:58,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:58,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:58,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:58,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:58,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:28:58,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 778 transitions, 10817 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:58,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:58,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:28:58,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:01,677 INFO L124 PetriNetUnfolderBase]: 5120/8301 cut-off events. [2024-06-14 12:29:01,677 INFO L125 PetriNetUnfolderBase]: For 2973104/2973109 co-relation queries the response was YES. [2024-06-14 12:29:01,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93598 conditions, 8301 events. 5120/8301 cut-off events. For 2973104/2973109 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54550 event pairs, 951 based on Foata normal form. 6/8255 useless extension candidates. Maximal degree in co-relation 93363. Up to 7476 conditions per place. [2024-06-14 12:29:01,850 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 684 selfloop transitions, 90 changer transitions 0/817 dead transitions. [2024-06-14 12:29:01,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 817 transitions, 12767 flow [2024-06-14 12:29:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:29:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:29:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:29:01,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43555555555555553 [2024-06-14 12:29:01,852 INFO L175 Difference]: Start difference. First operand has 490 places, 778 transitions, 10817 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:29:01,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 817 transitions, 12767 flow [2024-06-14 12:29:09,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 817 transitions, 12447 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:09,398 INFO L231 Difference]: Finished difference. Result has 494 places, 793 transitions, 11057 flow [2024-06-14 12:29:09,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10497, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11057, PETRI_PLACES=494, PETRI_TRANSITIONS=793} [2024-06-14 12:29:09,399 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 448 predicate places. [2024-06-14 12:29:09,399 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 793 transitions, 11057 flow [2024-06-14 12:29:09,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:09,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:09,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:09,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:29:09,399 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 12:29:09,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash -633088462, now seen corresponding path program 1 times [2024-06-14 12:29:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411983704] [2024-06-14 12:29:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411983704] [2024-06-14 12:29:10,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411983704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:10,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:10,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:10,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29788800] [2024-06-14 12:29:10,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:10,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-06-14 12:29:10,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 793 transitions, 11057 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:10,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:10,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-06-14 12:29:10,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:13,681 INFO L124 PetriNetUnfolderBase]: 5072/8291 cut-off events. [2024-06-14 12:29:13,682 INFO L125 PetriNetUnfolderBase]: For 2992269/2992269 co-relation queries the response was YES. [2024-06-14 12:29:13,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93299 conditions, 8291 events. 5072/8291 cut-off events. For 2992269/2992269 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54952 event pairs, 1069 based on Foata normal form. 1/8289 useless extension candidates. Maximal degree in co-relation 93062. Up to 7410 conditions per place. [2024-06-14 12:29:13,845 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 717 selfloop transitions, 21 changer transitions 0/819 dead transitions. [2024-06-14 12:29:13,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 819 transitions, 12741 flow [2024-06-14 12:29:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:29:13,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-06-14 12:29:13,846 INFO L175 Difference]: Start difference. First operand has 494 places, 793 transitions, 11057 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:29:13,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 819 transitions, 12741 flow [2024-06-14 12:29:21,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 819 transitions, 12475 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:21,708 INFO L231 Difference]: Finished difference. Result has 496 places, 796 transitions, 10965 flow [2024-06-14 12:29:21,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10791, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10965, PETRI_PLACES=496, PETRI_TRANSITIONS=796} [2024-06-14 12:29:21,709 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 450 predicate places. [2024-06-14 12:29:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 796 transitions, 10965 flow [2024-06-14 12:29:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:21,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:21,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:29:21,710 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 12:29:21,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -225218610, now seen corresponding path program 1 times [2024-06-14 12:29:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065949152] [2024-06-14 12:29:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:22,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065949152] [2024-06-14 12:29:22,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065949152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:22,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:22,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:22,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613689695] [2024-06-14 12:29:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:22,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:22,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:22,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:29:22,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 796 transitions, 10965 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:22,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:22,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:29:22,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:25,679 INFO L124 PetriNetUnfolderBase]: 5188/8411 cut-off events. [2024-06-14 12:29:25,679 INFO L125 PetriNetUnfolderBase]: For 3033677/3033677 co-relation queries the response was YES. [2024-06-14 12:29:25,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94336 conditions, 8411 events. 5188/8411 cut-off events. For 3033677/3033677 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 55190 event pairs, 1105 based on Foata normal form. 2/8410 useless extension candidates. Maximal degree in co-relation 94098. Up to 7762 conditions per place. [2024-06-14 12:29:25,839 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 769 selfloop transitions, 21 changer transitions 0/821 dead transitions. [2024-06-14 12:29:25,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 821 transitions, 12713 flow [2024-06-14 12:29:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:29:25,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41728395061728396 [2024-06-14 12:29:25,841 INFO L175 Difference]: Start difference. First operand has 496 places, 796 transitions, 10965 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:29:25,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 821 transitions, 12713 flow [2024-06-14 12:29:32,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 821 transitions, 12559 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:32,686 INFO L231 Difference]: Finished difference. Result has 498 places, 799 transitions, 10951 flow [2024-06-14 12:29:32,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10811, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10951, PETRI_PLACES=498, PETRI_TRANSITIONS=799} [2024-06-14 12:29:32,687 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 452 predicate places. [2024-06-14 12:29:32,687 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 799 transitions, 10951 flow [2024-06-14 12:29:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:32,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:32,687 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 12:29:32,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:29:32,688 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 12:29:32,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash -54343200, now seen corresponding path program 2 times [2024-06-14 12:29:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733654857] [2024-06-14 12:29:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:32,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:33,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733654857] [2024-06-14 12:29:33,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733654857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:33,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:33,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:33,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106001105] [2024-06-14 12:29:33,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:33,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:33,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:33,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:33,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:29:33,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 799 transitions, 10951 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:33,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:33,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:29:33,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:36,557 INFO L124 PetriNetUnfolderBase]: 5214/8449 cut-off events. [2024-06-14 12:29:36,558 INFO L125 PetriNetUnfolderBase]: For 3101399/3101399 co-relation queries the response was YES. [2024-06-14 12:29:36,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95748 conditions, 8449 events. 5214/8449 cut-off events. For 3101399/3101399 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55446 event pairs, 1108 based on Foata normal form. 2/8448 useless extension candidates. Maximal degree in co-relation 95509. Up to 7769 conditions per place. [2024-06-14 12:29:36,715 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 762 selfloop transitions, 33 changer transitions 0/826 dead transitions. [2024-06-14 12:29:36,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 826 transitions, 13125 flow [2024-06-14 12:29:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:29:36,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246913580246914 [2024-06-14 12:29:36,717 INFO L175 Difference]: Start difference. First operand has 498 places, 799 transitions, 10951 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:29:36,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 826 transitions, 13125 flow [2024-06-14 12:29:44,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 826 transitions, 13007 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:44,537 INFO L231 Difference]: Finished difference. Result has 500 places, 805 transitions, 11095 flow [2024-06-14 12:29:44,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10833, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11095, PETRI_PLACES=500, PETRI_TRANSITIONS=805} [2024-06-14 12:29:44,537 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 454 predicate places. [2024-06-14 12:29:44,537 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 805 transitions, 11095 flow [2024-06-14 12:29:44,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:44,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:44,538 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 12:29:44,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:29:44,538 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 12:29:44,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1882786156, now seen corresponding path program 3 times [2024-06-14 12:29:44,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:44,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665367012] [2024-06-14 12:29:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:44,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665367012] [2024-06-14 12:29:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665367012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:45,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:45,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:45,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543899754] [2024-06-14 12:29:45,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:45,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:45,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:29:45,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 805 transitions, 11095 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:45,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:45,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:29:45,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:48,825 INFO L124 PetriNetUnfolderBase]: 5208/8441 cut-off events. [2024-06-14 12:29:48,826 INFO L125 PetriNetUnfolderBase]: For 3115566/3115566 co-relation queries the response was YES. [2024-06-14 12:29:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95946 conditions, 8441 events. 5208/8441 cut-off events. For 3115566/3115566 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55369 event pairs, 1105 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 95706. Up to 7764 conditions per place. [2024-06-14 12:29:48,987 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 760 selfloop transitions, 34 changer transitions 0/825 dead transitions. [2024-06-14 12:29:48,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 825 transitions, 12755 flow [2024-06-14 12:29:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:29:48,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-06-14 12:29:48,988 INFO L175 Difference]: Start difference. First operand has 500 places, 805 transitions, 11095 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:29:48,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 825 transitions, 12755 flow [2024-06-14 12:29:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 825 transitions, 12558 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:55,456 INFO L231 Difference]: Finished difference. Result has 504 places, 805 transitions, 10972 flow [2024-06-14 12:29:55,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10898, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10972, PETRI_PLACES=504, PETRI_TRANSITIONS=805} [2024-06-14 12:29:55,457 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 458 predicate places. [2024-06-14 12:29:55,457 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 805 transitions, 10972 flow [2024-06-14 12:29:55,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:55,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:55,457 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 12:29:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:29:55,458 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 12:29:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1716552624, now seen corresponding path program 1 times [2024-06-14 12:29:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521718403] [2024-06-14 12:29:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:55,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:56,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:56,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521718403] [2024-06-14 12:29:56,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521718403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:56,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:56,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:56,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108322100] [2024-06-14 12:29:56,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:56,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:56,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:29:56,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 805 transitions, 10972 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:56,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:56,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:29:56,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:59,666 INFO L124 PetriNetUnfolderBase]: 5213/8450 cut-off events. [2024-06-14 12:29:59,667 INFO L125 PetriNetUnfolderBase]: For 3149813/3149813 co-relation queries the response was YES. [2024-06-14 12:29:59,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96081 conditions, 8450 events. 5213/8450 cut-off events. For 3149813/3149813 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 55499 event pairs, 1108 based on Foata normal form. 2/8449 useless extension candidates. Maximal degree in co-relation 95839. Up to 7811 conditions per place. [2024-06-14 12:29:59,825 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 773 selfloop transitions, 21 changer transitions 0/825 dead transitions. [2024-06-14 12:29:59,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 825 transitions, 12714 flow [2024-06-14 12:29:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:29:59,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049382716049383 [2024-06-14 12:29:59,826 INFO L175 Difference]: Start difference. First operand has 504 places, 805 transitions, 10972 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:29:59,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 825 transitions, 12714 flow [2024-06-14 12:30:07,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 825 transitions, 12638 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:07,906 INFO L231 Difference]: Finished difference. Result has 505 places, 808 transitions, 11044 flow [2024-06-14 12:30:07,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10896, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11044, PETRI_PLACES=505, PETRI_TRANSITIONS=808} [2024-06-14 12:30:07,907 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 459 predicate places. [2024-06-14 12:30:07,907 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 808 transitions, 11044 flow [2024-06-14 12:30:07,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:07,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:07,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:07,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:30:07,907 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 12:30:07,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:07,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1889042266, now seen corresponding path program 4 times [2024-06-14 12:30:07,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:07,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13478827] [2024-06-14 12:30:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:07,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:08,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13478827] [2024-06-14 12:30:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13478827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103464552] [2024-06-14 12:30:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:08,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:08,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:09,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-06-14 12:30:09,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 808 transitions, 11044 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:09,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:09,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-06-14 12:30:09,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:12,268 INFO L124 PetriNetUnfolderBase]: 5255/8512 cut-off events. [2024-06-14 12:30:12,268 INFO L125 PetriNetUnfolderBase]: For 3243923/3243923 co-relation queries the response was YES. [2024-06-14 12:30:12,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98005 conditions, 8512 events. 5255/8512 cut-off events. For 3243923/3243923 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 55903 event pairs, 1109 based on Foata normal form. 2/8511 useless extension candidates. Maximal degree in co-relation 97762. Up to 7782 conditions per place.