./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix037.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/mix037.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix037.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix037.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:42:57,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:42:57,476 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:42:57,479 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:42:57,480 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:42:57,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:42:57,499 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:42:57,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:42:57,499 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:42:57,500 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:42:57,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:42:57,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:42:57,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:42:57,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:42:57,501 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:42:57,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:42:57,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:42:57,502 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:42:57,503 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:42:57,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:42:57,503 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:42:57,504 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:42:57,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:42:57,504 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:42:57,515 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:42:57,515 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:42:57,516 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:42:57,516 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:42:57,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:42:57,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:42:57,519 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:42:57,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:42:57,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:42:57,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:42:57,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:42:57,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:42:57,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:42:57,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:42:57,521 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:42:57,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:42:57,522 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:42:57,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:42:57,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:42:57,523 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:42:57,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:42:57,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:42:57,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:42:57,774 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:42:57,775 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:42:57,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix037.opt.yml/witness.yml [2024-06-03 19:42:57,931 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:42:57,931 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:42:57,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix037.opt.i [2024-06-03 19:42:58,870 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:42:59,067 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:42:59,071 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037.opt.i [2024-06-03 19:42:59,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed17cd64d/77106d8a81f247dfa371e2e5e95d96e9/FLAG79e6854a1 [2024-06-03 19:42:59,096 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed17cd64d/77106d8a81f247dfa371e2e5e95d96e9 [2024-06-03 19:42:59,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:42:59,097 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:42:59,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:42:59,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:42:59,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:42:59,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:42:57" (1/2) ... [2024-06-03 19:42:59,104 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c7798e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:42:59, skipping insertion in model container [2024-06-03 19:42:59,104 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:42:57" (1/2) ... [2024-06-03 19:42:59,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7535cfe1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:42:59, skipping insertion in model container [2024-06-03 19:42:59,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:42:59" (2/2) ... [2024-06-03 19:42:59,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c7798e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59, skipping insertion in model container [2024-06-03 19:42:59,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:42:59" (2/2) ... [2024-06-03 19:42:59,106 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:42:59,197 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:42:59,198 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-03 19:42:59,198 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-03 19:42:59,199 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-03 19:42:59,199 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-03 19:42:59,199 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:42:59,199 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-03 19:42:59,241 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:42:59,535 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:42:59,542 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:42:59,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:42:59,717 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:42:59,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59 WrapperNode [2024-06-03 19:42:59,718 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:42:59,719 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:42:59,719 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:42:59,719 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:42:59,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,766 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-03 19:42:59,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:42:59,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:42:59,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:42:59,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:42:59,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,778 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,790 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:42:59,790 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,790 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:42:59,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:42:59,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:42:59,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:42:59,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (1/1) ... [2024-06-03 19:42:59,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:42:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:42:59,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:42:59,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:42:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:42:59,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:42:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:42:59,952 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:42:59,952 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:42:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:42:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:42:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:42:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:42:59,953 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:42:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:42:59,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:42:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:42:59,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:42:59,972 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:43:00,070 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:43:00,072 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:43:00,421 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:43:00,421 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:43:00,585 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:43:00,585 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:43:00,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:43:00 BoogieIcfgContainer [2024-06-03 19:43:00,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:43:00,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:43:00,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:43:00,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:43:00,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:42:57" (1/4) ... [2024-06-03 19:43:00,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c16be9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:43:00, skipping insertion in model container [2024-06-03 19:43:00,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:42:59" (2/4) ... [2024-06-03 19:43:00,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c16be9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:43:00, skipping insertion in model container [2024-06-03 19:43:00,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:42:59" (3/4) ... [2024-06-03 19:43:00,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c16be9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:43:00, skipping insertion in model container [2024-06-03 19:43:00,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:43:00" (4/4) ... [2024-06-03 19:43:00,594 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037.opt.i [2024-06-03 19:43:00,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:43:00,608 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:43:00,608 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:43:00,658 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:43:00,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:43:00,714 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-03 19:43:00,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:43:00,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:43:00,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:43:00,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-03 19:43:00,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:43:00,735 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;@78760b73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:43:00,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:43:00,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:43:00,739 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:43:00,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:43:00,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:00,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:43:00,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:00,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -961679146, now seen corresponding path program 1 times [2024-06-03 19:43:00,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:00,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684231968] [2024-06-03 19:43:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:00,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:01,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:01,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684231968] [2024-06-03 19:43:01,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684231968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:01,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:01,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:43:01,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581549063] [2024-06-03 19:43:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:01,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:43:01,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:43:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:43:01,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-03 19:43:01,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:01,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:01,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-03 19:43:01,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:03,013 INFO L124 PetriNetUnfolderBase]: 6201/9079 cut-off events. [2024-06-03 19:43:03,014 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-03 19:43:03,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17837 conditions, 9079 events. 6201/9079 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 53273 event pairs, 4673 based on Foata normal form. 1/8815 useless extension candidates. Maximal degree in co-relation 17821. Up to 8487 conditions per place. [2024-06-03 19:43:03,059 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-03 19:43:03,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 233 flow [2024-06-03 19:43:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:43:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:43:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-03 19:43:03,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-03 19:43:03,069 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 103 transitions. [2024-06-03 19:43:03,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 233 flow [2024-06-03 19:43:03,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:03,074 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-03 19:43:03,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-03 19:43:03,077 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-03 19:43:03,077 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-03 19:43:03,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:03,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:03,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:43:03,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:03,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash -755668363, now seen corresponding path program 1 times [2024-06-03 19:43:03,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:03,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109410492] [2024-06-03 19:43:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:03,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:03,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:03,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109410492] [2024-06-03 19:43:03,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109410492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:03,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:03,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:43:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644677492] [2024-06-03 19:43:03,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:03,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:43:03,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:43:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:43:03,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:43:03,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:03,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:03,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:43:03,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:04,746 INFO L124 PetriNetUnfolderBase]: 7096/10086 cut-off events. [2024-06-03 19:43:04,746 INFO L125 PetriNetUnfolderBase]: For 1992/1992 co-relation queries the response was YES. [2024-06-03 19:43:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22826 conditions, 10086 events. 7096/10086 cut-off events. For 1992/1992 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 57478 event pairs, 4749 based on Foata normal form. 4/9953 useless extension candidates. Maximal degree in co-relation 22811. Up to 9657 conditions per place. [2024-06-03 19:43:04,790 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:43:04,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-03 19:43:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:43:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:43:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-03 19:43:04,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-03 19:43:04,792 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-03 19:43:04,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-03 19:43:04,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:43:04,794 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-03 19:43:04,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-03 19:43:04,795 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-03 19:43:04,795 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-03 19:43:04,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:04,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:04,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:04,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:43:04,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:04,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1950882015, now seen corresponding path program 1 times [2024-06-03 19:43:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:04,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526826531] [2024-06-03 19:43:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:05,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:05,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526826531] [2024-06-03 19:43:05,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526826531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:05,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:05,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:43:05,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474360947] [2024-06-03 19:43:05,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:05,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:43:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:05,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:43:05,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:43:05,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:43:05,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:05,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:05,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:43:05,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:06,851 INFO L124 PetriNetUnfolderBase]: 7114/10143 cut-off events. [2024-06-03 19:43:06,851 INFO L125 PetriNetUnfolderBase]: For 5738/5738 co-relation queries the response was YES. [2024-06-03 19:43:06,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25691 conditions, 10143 events. 7114/10143 cut-off events. For 5738/5738 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 58041 event pairs, 3563 based on Foata normal form. 7/10042 useless extension candidates. Maximal degree in co-relation 25674. Up to 9578 conditions per place. [2024-06-03 19:43:06,892 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 72 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-03 19:43:06,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 543 flow [2024-06-03 19:43:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:43:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:43:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 171 transitions. [2024-06-03 19:43:06,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-03 19:43:06,895 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 171 transitions. [2024-06-03 19:43:06,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 543 flow [2024-06-03 19:43:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:43:06,898 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-03 19:43:06,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-03 19:43:06,899 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-03 19:43:06,899 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-03 19:43:06,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:06,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:06,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:43:06,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:06,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2103117216, now seen corresponding path program 1 times [2024-06-03 19:43:06,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:06,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423611219] [2024-06-03 19:43:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:07,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423611219] [2024-06-03 19:43:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423611219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:07,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:07,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:43:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181330718] [2024-06-03 19:43:07,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:07,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:43:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:43:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:43:07,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:43:07,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 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) [2024-06-03 19:43:07,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:07,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:43:07,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:08,775 INFO L124 PetriNetUnfolderBase]: 7256/10363 cut-off events. [2024-06-03 19:43:08,776 INFO L125 PetriNetUnfolderBase]: For 14087/14106 co-relation queries the response was YES. [2024-06-03 19:43:08,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30975 conditions, 10363 events. 7256/10363 cut-off events. For 14087/14106 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 59805 event pairs, 2792 based on Foata normal form. 48/10301 useless extension candidates. Maximal degree in co-relation 30955. Up to 9570 conditions per place. [2024-06-03 19:43:08,840 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 82 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-03 19:43:08,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 698 flow [2024-06-03 19:43:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-03 19:43:08,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-03 19:43:08,842 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 200 transitions. [2024-06-03 19:43:08,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 698 flow [2024-06-03 19:43:08,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 115 transitions, 686 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:43:08,849 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 383 flow [2024-06-03 19:43:08,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-03 19:43:08,850 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-03 19:43:08,850 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 383 flow [2024-06-03 19:43:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 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) [2024-06-03 19:43:08,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:08,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:08,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:43:08,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:08,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1873283113, now seen corresponding path program 1 times [2024-06-03 19:43:08,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:08,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16399645] [2024-06-03 19:43:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:08,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:09,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16399645] [2024-06-03 19:43:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16399645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:09,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:43:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301558435] [2024-06-03 19:43:09,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:09,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:43:09,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:43:09,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:43:09,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:43:09,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:09,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:09,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:43:09,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:10,743 INFO L124 PetriNetUnfolderBase]: 6342/9345 cut-off events. [2024-06-03 19:43:10,744 INFO L125 PetriNetUnfolderBase]: For 17908/17936 co-relation queries the response was YES. [2024-06-03 19:43:10,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29855 conditions, 9345 events. 6342/9345 cut-off events. For 17908/17936 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 55671 event pairs, 2937 based on Foata normal form. 3/9230 useless extension candidates. Maximal degree in co-relation 29832. Up to 8693 conditions per place. [2024-06-03 19:43:10,833 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 65 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-03 19:43:10,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 577 flow [2024-06-03 19:43:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:43:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:43:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-03 19:43:10,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-03 19:43:10,849 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 383 flow. Second operand 5 states and 141 transitions. [2024-06-03 19:43:10,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 577 flow [2024-06-03 19:43:10,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 516 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:10,856 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 353 flow [2024-06-03 19:43:10,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-03 19:43:10,856 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-03 19:43:10,856 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 353 flow [2024-06-03 19:43:10,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:10,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:10,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:10,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:43:10,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:10,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 86952998, now seen corresponding path program 1 times [2024-06-03 19:43:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950412379] [2024-06-03 19:43:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950412379] [2024-06-03 19:43:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950412379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:11,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:11,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:43:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786954984] [2024-06-03 19:43:11,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:11,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:43:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:43:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:43:11,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:11,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:11,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:11,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:11,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:13,128 INFO L124 PetriNetUnfolderBase]: 7260/10350 cut-off events. [2024-06-03 19:43:13,129 INFO L125 PetriNetUnfolderBase]: For 23873/23893 co-relation queries the response was YES. [2024-06-03 19:43:13,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33806 conditions, 10350 events. 7260/10350 cut-off events. For 23873/23893 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 59531 event pairs, 3413 based on Foata normal form. 24/10255 useless extension candidates. Maximal degree in co-relation 33781. Up to 9800 conditions per place. [2024-06-03 19:43:13,186 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 68 selfloop transitions, 25 changer transitions 0/102 dead transitions. [2024-06-03 19:43:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 676 flow [2024-06-03 19:43:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-03 19:43:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339506172839507 [2024-06-03 19:43:13,187 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 353 flow. Second operand 6 states and 173 transitions. [2024-06-03 19:43:13,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 676 flow [2024-06-03 19:43:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 647 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:13,195 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 420 flow [2024-06-03 19:43:13,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=420, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-03 19:43:13,196 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:43:13,196 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 420 flow [2024-06-03 19:43:13,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:13,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:13,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:43:13,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:13,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash 633806472, now seen corresponding path program 2 times [2024-06-03 19:43:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:13,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863009717] [2024-06-03 19:43:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:14,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863009717] [2024-06-03 19:43:14,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863009717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:14,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:14,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:43:14,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240873484] [2024-06-03 19:43:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:43:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:43:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:43:14,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:14,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:14,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:14,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:15,392 INFO L124 PetriNetUnfolderBase]: 7215/10277 cut-off events. [2024-06-03 19:43:15,393 INFO L125 PetriNetUnfolderBase]: For 28445/28471 co-relation queries the response was YES. [2024-06-03 19:43:15,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34492 conditions, 10277 events. 7215/10277 cut-off events. For 28445/28471 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58993 event pairs, 3427 based on Foata normal form. 24/10179 useless extension candidates. Maximal degree in co-relation 34467. Up to 9731 conditions per place. [2024-06-03 19:43:15,448 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 61 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-03 19:43:15,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 656 flow [2024-06-03 19:43:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-03 19:43:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-03 19:43:15,449 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 420 flow. Second operand 6 states and 168 transitions. [2024-06-03 19:43:15,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 656 flow [2024-06-03 19:43:15,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 613 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:15,461 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 440 flow [2024-06-03 19:43:15,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=440, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-03 19:43:15,462 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-03 19:43:15,462 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 440 flow [2024-06-03 19:43:15,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:15,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:15,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:15,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:43:15,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:15,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:15,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2052794320, now seen corresponding path program 1 times [2024-06-03 19:43:15,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:15,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935475206] [2024-06-03 19:43:15,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:15,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935475206] [2024-06-03 19:43:16,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935475206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:16,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:16,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115842004] [2024-06-03 19:43:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:16,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:16,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:16,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:16,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 440 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:16,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:16,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:16,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:18,170 INFO L124 PetriNetUnfolderBase]: 8039/11720 cut-off events. [2024-06-03 19:43:18,171 INFO L125 PetriNetUnfolderBase]: For 36007/36007 co-relation queries the response was YES. [2024-06-03 19:43:18,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38946 conditions, 11720 events. 8039/11720 cut-off events. For 36007/36007 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 68702 event pairs, 3744 based on Foata normal form. 6/11586 useless extension candidates. Maximal degree in co-relation 38920. Up to 10907 conditions per place. [2024-06-03 19:43:18,226 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 85 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-03 19:43:18,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 781 flow [2024-06-03 19:43:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-03 19:43:18,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:43:18,229 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 440 flow. Second operand 7 states and 189 transitions. [2024-06-03 19:43:18,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 781 flow [2024-06-03 19:43:18,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 690 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:18,248 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 461 flow [2024-06-03 19:43:18,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-03 19:43:18,249 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-03 19:43:18,249 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 461 flow [2024-06-03 19:43:18,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:18,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:18,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:18,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:43:18,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:18,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2077697426, now seen corresponding path program 1 times [2024-06-03 19:43:18,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:18,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460967069] [2024-06-03 19:43:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:18,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:18,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460967069] [2024-06-03 19:43:18,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460967069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:18,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:18,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:43:18,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987205206] [2024-06-03 19:43:18,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:18,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:43:18,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:43:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:43:19,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:19,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:19,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:19,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:20,257 INFO L124 PetriNetUnfolderBase]: 8025/11914 cut-off events. [2024-06-03 19:43:20,257 INFO L125 PetriNetUnfolderBase]: For 44879/44879 co-relation queries the response was YES. [2024-06-03 19:43:20,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41611 conditions, 11914 events. 8025/11914 cut-off events. For 44879/44879 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 71561 event pairs, 3811 based on Foata normal form. 4/11901 useless extension candidates. Maximal degree in co-relation 41583. Up to 10931 conditions per place. [2024-06-03 19:43:20,309 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 79 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2024-06-03 19:43:20,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 709 flow [2024-06-03 19:43:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:43:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:43:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-03 19:43:20,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-03 19:43:20,311 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 461 flow. Second operand 5 states and 134 transitions. [2024-06-03 19:43:20,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 709 flow [2024-06-03 19:43:20,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 661 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:20,328 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 482 flow [2024-06-03 19:43:20,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-03 19:43:20,329 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2024-06-03 19:43:20,329 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 482 flow [2024-06-03 19:43:20,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:20,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:20,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:43:20,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 729980441, now seen corresponding path program 1 times [2024-06-03 19:43:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283157724] [2024-06-03 19:43:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:21,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:21,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283157724] [2024-06-03 19:43:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283157724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:21,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347254560] [2024-06-03 19:43:21,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:21,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:21,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:21,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 482 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:21,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:21,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:21,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:22,855 INFO L124 PetriNetUnfolderBase]: 9156/13097 cut-off events. [2024-06-03 19:43:22,855 INFO L125 PetriNetUnfolderBase]: For 68811/68843 co-relation queries the response was YES. [2024-06-03 19:43:22,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50049 conditions, 13097 events. 9156/13097 cut-off events. For 68811/68843 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 76999 event pairs, 3617 based on Foata normal form. 34/13058 useless extension candidates. Maximal degree in co-relation 50020. Up to 11790 conditions per place. [2024-06-03 19:43:22,937 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 90 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-03 19:43:22,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 132 transitions, 950 flow [2024-06-03 19:43:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-03 19:43:22,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-03 19:43:22,938 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 482 flow. Second operand 7 states and 203 transitions. [2024-06-03 19:43:22,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 132 transitions, 950 flow [2024-06-03 19:43:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 132 transitions, 911 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:22,965 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 572 flow [2024-06-03 19:43:22,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=572, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-03 19:43:22,965 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-03 19:43:22,965 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 572 flow [2024-06-03 19:43:22,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:22,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:22,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:22,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:43:22,966 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:22,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash 730040891, now seen corresponding path program 2 times [2024-06-03 19:43:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232271597] [2024-06-03 19:43:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:23,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232271597] [2024-06-03 19:43:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232271597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:23,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:23,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:23,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795062410] [2024-06-03 19:43:23,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:23,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:23,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:23,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:23,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:23,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:23,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:23,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:25,472 INFO L124 PetriNetUnfolderBase]: 9269/13278 cut-off events. [2024-06-03 19:43:25,472 INFO L125 PetriNetUnfolderBase]: For 83586/83618 co-relation queries the response was YES. [2024-06-03 19:43:25,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52843 conditions, 13278 events. 9269/13278 cut-off events. For 83586/83618 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 78300 event pairs, 4154 based on Foata normal form. 62/13266 useless extension candidates. Maximal degree in co-relation 52813. Up to 12362 conditions per place. [2024-06-03 19:43:25,559 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 87 selfloop transitions, 31 changer transitions 0/128 dead transitions. [2024-06-03 19:43:25,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 944 flow [2024-06-03 19:43:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-03 19:43:25,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 19:43:25,562 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 572 flow. Second operand 7 states and 199 transitions. [2024-06-03 19:43:25,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 944 flow [2024-06-03 19:43:25,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 897 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:25,617 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 640 flow [2024-06-03 19:43:25,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=640, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2024-06-03 19:43:25,617 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-06-03 19:43:25,617 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 640 flow [2024-06-03 19:43:25,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:25,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:25,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:25,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:43:25,618 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:25,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash 617692681, now seen corresponding path program 1 times [2024-06-03 19:43:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:25,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507852886] [2024-06-03 19:43:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:26,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:26,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507852886] [2024-06-03 19:43:26,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507852886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:26,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:26,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:43:26,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277290300] [2024-06-03 19:43:26,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:26,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:43:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:26,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:43:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:43:26,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:26,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 640 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:26,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:26,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:28,082 INFO L124 PetriNetUnfolderBase]: 9615/13715 cut-off events. [2024-06-03 19:43:28,082 INFO L125 PetriNetUnfolderBase]: For 95625/95625 co-relation queries the response was YES. [2024-06-03 19:43:28,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56382 conditions, 13715 events. 9615/13715 cut-off events. For 95625/95625 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 78430 event pairs, 4323 based on Foata normal form. 4/13637 useless extension candidates. Maximal degree in co-relation 56350. Up to 13042 conditions per place. [2024-06-03 19:43:28,171 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 98 selfloop transitions, 21 changer transitions 0/127 dead transitions. [2024-06-03 19:43:28,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 127 transitions, 1074 flow [2024-06-03 19:43:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-03 19:43:28,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-03 19:43:28,173 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 640 flow. Second operand 6 states and 164 transitions. [2024-06-03 19:43:28,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 127 transitions, 1074 flow [2024-06-03 19:43:28,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 127 transitions, 995 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:28,252 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 700 flow [2024-06-03 19:43:28,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-03 19:43:28,253 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-03 19:43:28,253 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 700 flow [2024-06-03 19:43:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:28,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:28,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:43:28,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:28,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -192249353, now seen corresponding path program 1 times [2024-06-03 19:43:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154492943] [2024-06-03 19:43:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:29,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154492943] [2024-06-03 19:43:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154492943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:29,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:29,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:29,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848384456] [2024-06-03 19:43:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:29,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:29,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:29,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:29,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 700 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:29,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:29,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:29,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:31,162 INFO L124 PetriNetUnfolderBase]: 9673/13774 cut-off events. [2024-06-03 19:43:31,163 INFO L125 PetriNetUnfolderBase]: For 113765/113771 co-relation queries the response was YES. [2024-06-03 19:43:31,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59351 conditions, 13774 events. 9673/13774 cut-off events. For 113765/113771 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 78552 event pairs, 4116 based on Foata normal form. 8/13696 useless extension candidates. Maximal degree in co-relation 59318. Up to 12941 conditions per place. [2024-06-03 19:43:31,252 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 102 selfloop transitions, 37 changer transitions 0/147 dead transitions. [2024-06-03 19:43:31,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 147 transitions, 1162 flow [2024-06-03 19:43:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-03 19:43:31,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:43:31,254 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 700 flow. Second operand 8 states and 216 transitions. [2024-06-03 19:43:31,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 147 transitions, 1162 flow [2024-06-03 19:43:31,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 147 transitions, 1120 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 19:43:31,323 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 833 flow [2024-06-03 19:43:31,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=833, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2024-06-03 19:43:31,323 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-03 19:43:31,323 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 833 flow [2024-06-03 19:43:31,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:31,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:31,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:43:31,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1345087889, now seen corresponding path program 2 times [2024-06-03 19:43:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021455710] [2024-06-03 19:43:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021455710] [2024-06-03 19:43:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021455710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:32,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:32,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125474849] [2024-06-03 19:43:32,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:32,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:32,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:32,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 833 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:34,192 INFO L124 PetriNetUnfolderBase]: 9658/13757 cut-off events. [2024-06-03 19:43:34,192 INFO L125 PetriNetUnfolderBase]: For 130398/130404 co-relation queries the response was YES. [2024-06-03 19:43:34,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61788 conditions, 13757 events. 9658/13757 cut-off events. For 130398/130404 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 78375 event pairs, 4113 based on Foata normal form. 8/13680 useless extension candidates. Maximal degree in co-relation 61752. Up to 12920 conditions per place. [2024-06-03 19:43:34,294 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 104 selfloop transitions, 45 changer transitions 0/157 dead transitions. [2024-06-03 19:43:34,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 1361 flow [2024-06-03 19:43:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-03 19:43:34,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:43:34,296 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 833 flow. Second operand 8 states and 216 transitions. [2024-06-03 19:43:34,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 1361 flow [2024-06-03 19:43:34,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1243 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:34,383 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 962 flow [2024-06-03 19:43:34,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=962, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-06-03 19:43:34,383 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-06-03 19:43:34,384 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 962 flow [2024-06-03 19:43:34,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:34,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:34,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:34,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:43:34,384 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:34,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:34,385 INFO L85 PathProgramCache]: Analyzing trace with hash -490515821, now seen corresponding path program 3 times [2024-06-03 19:43:34,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:34,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116962725] [2024-06-03 19:43:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:34,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116962725] [2024-06-03 19:43:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116962725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:35,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335434828] [2024-06-03 19:43:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:35,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:35,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:35,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 962 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:35,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:35,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:35,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:37,108 INFO L124 PetriNetUnfolderBase]: 9735/13888 cut-off events. [2024-06-03 19:43:37,108 INFO L125 PetriNetUnfolderBase]: For 148023/148029 co-relation queries the response was YES. [2024-06-03 19:43:37,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64328 conditions, 13888 events. 9735/13888 cut-off events. For 148023/148029 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 79412 event pairs, 3700 based on Foata normal form. 8/13810 useless extension candidates. Maximal degree in co-relation 64290. Up to 12759 conditions per place. [2024-06-03 19:43:37,211 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 102 selfloop transitions, 56 changer transitions 0/166 dead transitions. [2024-06-03 19:43:37,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 166 transitions, 1460 flow [2024-06-03 19:43:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-03 19:43:37,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-03 19:43:37,212 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 962 flow. Second operand 8 states and 220 transitions. [2024-06-03 19:43:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 166 transitions, 1460 flow [2024-06-03 19:43:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 166 transitions, 1366 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:37,327 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1081 flow [2024-06-03 19:43:37,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1081, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-03 19:43:37,330 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-03 19:43:37,330 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1081 flow [2024-06-03 19:43:37,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:37,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:37,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:37,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:43:37,331 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:37,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash 492612557, now seen corresponding path program 2 times [2024-06-03 19:43:37,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:37,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136150529] [2024-06-03 19:43:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136150529] [2024-06-03 19:43:38,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136150529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:38,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:38,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:43:38,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118141954] [2024-06-03 19:43:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:43:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:43:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:43:38,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:38,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1081 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:38,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:38,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:38,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:39,602 INFO L124 PetriNetUnfolderBase]: 9721/13880 cut-off events. [2024-06-03 19:43:39,603 INFO L125 PetriNetUnfolderBase]: For 166741/166752 co-relation queries the response was YES. [2024-06-03 19:43:39,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66214 conditions, 13880 events. 9721/13880 cut-off events. For 166741/166752 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 79444 event pairs, 4061 based on Foata normal form. 14/13814 useless extension candidates. Maximal degree in co-relation 66174. Up to 13210 conditions per place. [2024-06-03 19:43:39,703 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 113 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2024-06-03 19:43:39,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 1399 flow [2024-06-03 19:43:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 19:43:39,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-03 19:43:39,705 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1081 flow. Second operand 6 states and 155 transitions. [2024-06-03 19:43:39,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 1399 flow [2024-06-03 19:43:39,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 142 transitions, 1248 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:39,818 INFO L231 Difference]: Finished difference. Result has 105 places, 122 transitions, 981 flow [2024-06-03 19:43:39,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=981, PETRI_PLACES=105, PETRI_TRANSITIONS=122} [2024-06-03 19:43:39,819 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-03 19:43:39,819 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 122 transitions, 981 flow [2024-06-03 19:43:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:39,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:39,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:39,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:43:39,819 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:39,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash 486904589, now seen corresponding path program 1 times [2024-06-03 19:43:39,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:39,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126164234] [2024-06-03 19:43:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:39,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126164234] [2024-06-03 19:43:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126164234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:43:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570771195] [2024-06-03 19:43:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:43:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:43:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:43:40,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:40,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 981 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:40,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:40,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:40,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:42,177 INFO L124 PetriNetUnfolderBase]: 8603/12702 cut-off events. [2024-06-03 19:43:42,178 INFO L125 PetriNetUnfolderBase]: For 156937/156937 co-relation queries the response was YES. [2024-06-03 19:43:42,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59851 conditions, 12702 events. 8603/12702 cut-off events. For 156937/156937 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 76066 event pairs, 3492 based on Foata normal form. 4/12620 useless extension candidates. Maximal degree in co-relation 59810. Up to 11727 conditions per place. [2024-06-03 19:43:42,270 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 126 selfloop transitions, 21 changer transitions 0/156 dead transitions. [2024-06-03 19:43:42,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 156 transitions, 1487 flow [2024-06-03 19:43:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-03 19:43:42,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-03 19:43:42,271 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 981 flow. Second operand 6 states and 166 transitions. [2024-06-03 19:43:42,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 156 transitions, 1487 flow [2024-06-03 19:43:42,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1428 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:42,387 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1065 flow [2024-06-03 19:43:42,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-06-03 19:43:42,388 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-03 19:43:42,388 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1065 flow [2024-06-03 19:43:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:42,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:42,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:42,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:43:42,389 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:42,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1352184959, now seen corresponding path program 2 times [2024-06-03 19:43:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:42,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103481136] [2024-06-03 19:43:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103481136] [2024-06-03 19:43:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103481136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:43,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:43,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:43:43,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487738217] [2024-06-03 19:43:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:43,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:43:43,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:43:43,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:43:43,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:43:43,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1065 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:43,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:43,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:43:43,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:44,771 INFO L124 PetriNetUnfolderBase]: 8589/12688 cut-off events. [2024-06-03 19:43:44,772 INFO L125 PetriNetUnfolderBase]: For 176489/176494 co-relation queries the response was YES. [2024-06-03 19:43:44,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62399 conditions, 12688 events. 8589/12688 cut-off events. For 176489/176494 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 75996 event pairs, 3469 based on Foata normal form. 8/12614 useless extension candidates. Maximal degree in co-relation 62357. Up to 11715 conditions per place. [2024-06-03 19:43:44,864 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 120 selfloop transitions, 21 changer transitions 0/150 dead transitions. [2024-06-03 19:43:44,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1397 flow [2024-06-03 19:43:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:43:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:43:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 19:43:44,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-03 19:43:44,866 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1065 flow. Second operand 6 states and 160 transitions. [2024-06-03 19:43:44,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1397 flow [2024-06-03 19:43:45,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1327 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 19:43:45,010 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 1046 flow [2024-06-03 19:43:45,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1046, PETRI_PLACES=110, PETRI_TRANSITIONS=130} [2024-06-03 19:43:45,011 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-03 19:43:45,011 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 1046 flow [2024-06-03 19:43:45,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:45,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:45,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:45,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:43:45,012 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:45,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2031527317, now seen corresponding path program 1 times [2024-06-03 19:43:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731058749] [2024-06-03 19:43:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:45,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:45,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731058749] [2024-06-03 19:43:45,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731058749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:45,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:45,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913655763] [2024-06-03 19:43:45,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:45,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:45,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:45,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 130 transitions, 1046 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:45,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:45,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:45,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:47,602 INFO L124 PetriNetUnfolderBase]: 9849/14070 cut-off events. [2024-06-03 19:43:47,602 INFO L125 PetriNetUnfolderBase]: For 222556/222561 co-relation queries the response was YES. [2024-06-03 19:43:47,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71428 conditions, 14070 events. 9849/14070 cut-off events. For 222556/222561 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 80537 event pairs, 3955 based on Foata normal form. 12/13986 useless extension candidates. Maximal degree in co-relation 71384. Up to 13008 conditions per place. [2024-06-03 19:43:47,704 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 130 selfloop transitions, 52 changer transitions 0/190 dead transitions. [2024-06-03 19:43:47,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 190 transitions, 1848 flow [2024-06-03 19:43:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-03 19:43:47,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 19:43:47,706 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 1046 flow. Second operand 7 states and 201 transitions. [2024-06-03 19:43:47,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 190 transitions, 1848 flow [2024-06-03 19:43:47,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 190 transitions, 1793 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:47,856 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1356 flow [2024-06-03 19:43:47,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1356, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2024-06-03 19:43:47,857 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-03 19:43:47,857 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1356 flow [2024-06-03 19:43:47,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:47,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:47,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:47,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:43:47,858 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:47,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash 527908621, now seen corresponding path program 1 times [2024-06-03 19:43:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690891291] [2024-06-03 19:43:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:47,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:48,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:48,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690891291] [2024-06-03 19:43:48,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690891291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:48,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:48,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510073618] [2024-06-03 19:43:48,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:48,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:48,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:48,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:48,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1356 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:48,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:48,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:48,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:50,745 INFO L124 PetriNetUnfolderBase]: 10091/14460 cut-off events. [2024-06-03 19:43:50,745 INFO L125 PetriNetUnfolderBase]: For 259165/259165 co-relation queries the response was YES. [2024-06-03 19:43:50,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77867 conditions, 14460 events. 10091/14460 cut-off events. For 259165/259165 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 83523 event pairs, 4079 based on Foata normal form. 18/14392 useless extension candidates. Maximal degree in co-relation 77820. Up to 13080 conditions per place. [2024-06-03 19:43:50,871 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 144 selfloop transitions, 53 changer transitions 0/205 dead transitions. [2024-06-03 19:43:50,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 205 transitions, 1983 flow [2024-06-03 19:43:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-03 19:43:50,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-03 19:43:50,873 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1356 flow. Second operand 8 states and 221 transitions. [2024-06-03 19:43:50,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 205 transitions, 1983 flow [2024-06-03 19:43:51,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 205 transitions, 1881 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:51,083 INFO L231 Difference]: Finished difference. Result has 121 places, 157 transitions, 1519 flow [2024-06-03 19:43:51,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=121, PETRI_TRANSITIONS=157} [2024-06-03 19:43:51,084 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-03 19:43:51,084 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 157 transitions, 1519 flow [2024-06-03 19:43:51,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:51,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:51,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:51,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:43:51,084 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:51,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:51,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1968605435, now seen corresponding path program 2 times [2024-06-03 19:43:51,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:51,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760012262] [2024-06-03 19:43:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:51,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:52,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:52,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760012262] [2024-06-03 19:43:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760012262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:52,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:52,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321361992] [2024-06-03 19:43:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:52,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:52,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 157 transitions, 1519 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:52,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:52,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:52,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:53,897 INFO L124 PetriNetUnfolderBase]: 10257/14698 cut-off events. [2024-06-03 19:43:53,898 INFO L125 PetriNetUnfolderBase]: For 277822/277827 co-relation queries the response was YES. [2024-06-03 19:43:53,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80223 conditions, 14698 events. 10257/14698 cut-off events. For 277822/277827 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 84995 event pairs, 4003 based on Foata normal form. 12/14614 useless extension candidates. Maximal degree in co-relation 80173. Up to 13498 conditions per place. [2024-06-03 19:43:54,030 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 137 selfloop transitions, 58 changer transitions 0/203 dead transitions. [2024-06-03 19:43:54,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 203 transitions, 2283 flow [2024-06-03 19:43:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-03 19:43:54,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-03 19:43:54,032 INFO L175 Difference]: Start difference. First operand has 121 places, 157 transitions, 1519 flow. Second operand 7 states and 195 transitions. [2024-06-03 19:43:54,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 203 transitions, 2283 flow [2024-06-03 19:43:54,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 203 transitions, 2195 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:54,295 INFO L231 Difference]: Finished difference. Result has 126 places, 167 transitions, 1705 flow [2024-06-03 19:43:54,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1705, PETRI_PLACES=126, PETRI_TRANSITIONS=167} [2024-06-03 19:43:54,296 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-03 19:43:54,296 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 167 transitions, 1705 flow [2024-06-03 19:43:54,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:54,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:54,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:54,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:43:54,297 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:54,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1328655535, now seen corresponding path program 2 times [2024-06-03 19:43:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:54,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404982852] [2024-06-03 19:43:54,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:55,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:55,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404982852] [2024-06-03 19:43:55,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404982852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:55,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:55,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:55,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753667253] [2024-06-03 19:43:55,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:55,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:55,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:55,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:55,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:55,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 167 transitions, 1705 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:55,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:55,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:55,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:57,245 INFO L124 PetriNetUnfolderBase]: 10218/14645 cut-off events. [2024-06-03 19:43:57,245 INFO L125 PetriNetUnfolderBase]: For 297041/297041 co-relation queries the response was YES. [2024-06-03 19:43:57,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80708 conditions, 14645 events. 10218/14645 cut-off events. For 297041/297041 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 84609 event pairs, 2988 based on Foata normal form. 18/14577 useless extension candidates. Maximal degree in co-relation 80656. Up to 12561 conditions per place. [2024-06-03 19:43:57,367 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 140 selfloop transitions, 61 changer transitions 0/209 dead transitions. [2024-06-03 19:43:57,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 209 transitions, 2227 flow [2024-06-03 19:43:57,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-03 19:43:57,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-03 19:43:57,370 INFO L175 Difference]: Start difference. First operand has 126 places, 167 transitions, 1705 flow. Second operand 7 states and 197 transitions. [2024-06-03 19:43:57,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 209 transitions, 2227 flow [2024-06-03 19:43:57,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 209 transitions, 2105 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:57,714 INFO L231 Difference]: Finished difference. Result has 130 places, 167 transitions, 1718 flow [2024-06-03 19:43:57,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1718, PETRI_PLACES=130, PETRI_TRANSITIONS=167} [2024-06-03 19:43:57,714 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 73 predicate places. [2024-06-03 19:43:57,714 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 167 transitions, 1718 flow [2024-06-03 19:43:57,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:57,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:57,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:57,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:43:57,715 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:43:57,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1337852305, now seen corresponding path program 3 times [2024-06-03 19:43:57,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:57,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594766962] [2024-06-03 19:43:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:58,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:58,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594766962] [2024-06-03 19:43:58,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594766962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:58,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:58,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:58,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438356932] [2024-06-03 19:43:58,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:58,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:58,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:43:58,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 167 transitions, 1718 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:58,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:58,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:43:58,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:00,581 INFO L124 PetriNetUnfolderBase]: 10179/14577 cut-off events. [2024-06-03 19:44:00,582 INFO L125 PetriNetUnfolderBase]: For 315462/315466 co-relation queries the response was YES. [2024-06-03 19:44:00,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80955 conditions, 14577 events. 10179/14577 cut-off events. For 315462/315466 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 84154 event pairs, 2511 based on Foata normal form. 19/14497 useless extension candidates. Maximal degree in co-relation 80902. Up to 12322 conditions per place. [2024-06-03 19:44:00,730 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 134 selfloop transitions, 63 changer transitions 0/205 dead transitions. [2024-06-03 19:44:00,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 205 transitions, 2226 flow [2024-06-03 19:44:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-03 19:44:00,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-03 19:44:00,731 INFO L175 Difference]: Start difference. First operand has 130 places, 167 transitions, 1718 flow. Second operand 7 states and 190 transitions. [2024-06-03 19:44:00,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 205 transitions, 2226 flow [2024-06-03 19:44:00,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 205 transitions, 2064 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:00,967 INFO L231 Difference]: Finished difference. Result has 130 places, 168 transitions, 1701 flow [2024-06-03 19:44:00,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1701, PETRI_PLACES=130, PETRI_TRANSITIONS=168} [2024-06-03 19:44:00,967 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 73 predicate places. [2024-06-03 19:44:00,967 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 168 transitions, 1701 flow [2024-06-03 19:44:00,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:00,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:00,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:00,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:44:00,968 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:00,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:00,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2042002837, now seen corresponding path program 3 times [2024-06-03 19:44:00,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693752596] [2024-06-03 19:44:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:00,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693752596] [2024-06-03 19:44:01,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693752596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:01,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:01,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962128633] [2024-06-03 19:44:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:01,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:01,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 168 transitions, 1701 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:01,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:01,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:01,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:03,823 INFO L124 PetriNetUnfolderBase]: 10161/14517 cut-off events. [2024-06-03 19:44:03,823 INFO L125 PetriNetUnfolderBase]: For 309726/309750 co-relation queries the response was YES. [2024-06-03 19:44:03,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81192 conditions, 14517 events. 10161/14517 cut-off events. For 309726/309750 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83427 event pairs, 3989 based on Foata normal form. 23/14493 useless extension candidates. Maximal degree in co-relation 81138. Up to 13376 conditions per place. [2024-06-03 19:44:03,954 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 131 selfloop transitions, 58 changer transitions 0/197 dead transitions. [2024-06-03 19:44:03,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 197 transitions, 2325 flow [2024-06-03 19:44:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-03 19:44:03,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-03 19:44:03,955 INFO L175 Difference]: Start difference. First operand has 130 places, 168 transitions, 1701 flow. Second operand 7 states and 188 transitions. [2024-06-03 19:44:03,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 197 transitions, 2325 flow [2024-06-03 19:44:04,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 197 transitions, 2150 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:04,449 INFO L231 Difference]: Finished difference. Result has 132 places, 168 transitions, 1653 flow [2024-06-03 19:44:04,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=132, PETRI_TRANSITIONS=168} [2024-06-03 19:44:04,449 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-03 19:44:04,450 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 168 transitions, 1653 flow [2024-06-03 19:44:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:04,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:04,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:04,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:44:04,450 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:04,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash -602821625, now seen corresponding path program 1 times [2024-06-03 19:44:04,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:04,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951070431] [2024-06-03 19:44:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:04,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951070431] [2024-06-03 19:44:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951070431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:05,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:05,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:05,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174989200] [2024-06-03 19:44:05,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:05,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:05,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:05,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:44:05,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 168 transitions, 1653 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:05,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:05,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:44:05,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:07,385 INFO L124 PetriNetUnfolderBase]: 9043/13218 cut-off events. [2024-06-03 19:44:07,385 INFO L125 PetriNetUnfolderBase]: For 282837/282837 co-relation queries the response was YES. [2024-06-03 19:44:07,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73254 conditions, 13218 events. 9043/13218 cut-off events. For 282837/282837 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 78593 event pairs, 3499 based on Foata normal form. 4/13151 useless extension candidates. Maximal degree in co-relation 73199. Up to 12371 conditions per place. [2024-06-03 19:44:07,481 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 174 selfloop transitions, 18 changer transitions 0/201 dead transitions. [2024-06-03 19:44:07,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 201 transitions, 2163 flow [2024-06-03 19:44:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-03 19:44:07,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-03 19:44:07,483 INFO L175 Difference]: Start difference. First operand has 132 places, 168 transitions, 1653 flow. Second operand 7 states and 185 transitions. [2024-06-03 19:44:07,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 201 transitions, 2163 flow [2024-06-03 19:44:07,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 201 transitions, 2004 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:07,733 INFO L231 Difference]: Finished difference. Result has 133 places, 172 transitions, 1599 flow [2024-06-03 19:44:07,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1599, PETRI_PLACES=133, PETRI_TRANSITIONS=172} [2024-06-03 19:44:07,733 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-03 19:44:07,734 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 172 transitions, 1599 flow [2024-06-03 19:44:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:07,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:07,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:44:07,735 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:07,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2085825231, now seen corresponding path program 2 times [2024-06-03 19:44:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:07,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438621392] [2024-06-03 19:44:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:08,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:08,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438621392] [2024-06-03 19:44:08,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438621392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:08,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:08,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:08,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305637198] [2024-06-03 19:44:08,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:08,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:08,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:08,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:44:08,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 172 transitions, 1599 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:08,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:44:08,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:10,800 INFO L124 PetriNetUnfolderBase]: 9075/13304 cut-off events. [2024-06-03 19:44:10,800 INFO L125 PetriNetUnfolderBase]: For 305349/305349 co-relation queries the response was YES. [2024-06-03 19:44:10,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75279 conditions, 13304 events. 9075/13304 cut-off events. For 305349/305349 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 79357 event pairs, 3438 based on Foata normal form. 4/13240 useless extension candidates. Maximal degree in co-relation 75225. Up to 12302 conditions per place. [2024-06-03 19:44:10,901 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 167 selfloop transitions, 35 changer transitions 0/211 dead transitions. [2024-06-03 19:44:10,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 211 transitions, 2295 flow [2024-06-03 19:44:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-03 19:44:10,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-03 19:44:10,902 INFO L175 Difference]: Start difference. First operand has 133 places, 172 transitions, 1599 flow. Second operand 7 states and 191 transitions. [2024-06-03 19:44:10,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 211 transitions, 2295 flow [2024-06-03 19:44:11,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 211 transitions, 2220 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:11,178 INFO L231 Difference]: Finished difference. Result has 135 places, 180 transitions, 1731 flow [2024-06-03 19:44:11,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1731, PETRI_PLACES=135, PETRI_TRANSITIONS=180} [2024-06-03 19:44:11,179 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-03 19:44:11,179 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 180 transitions, 1731 flow [2024-06-03 19:44:11,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:11,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:11,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:11,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:44:11,180 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:11,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2060310491, now seen corresponding path program 3 times [2024-06-03 19:44:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610411434] [2024-06-03 19:44:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:11,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:12,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:12,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610411434] [2024-06-03 19:44:12,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610411434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:12,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:12,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:12,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740480737] [2024-06-03 19:44:12,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:12,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:12,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:12,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:12,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:44:12,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 180 transitions, 1731 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:44:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:13,961 INFO L124 PetriNetUnfolderBase]: 9061/13284 cut-off events. [2024-06-03 19:44:13,961 INFO L125 PetriNetUnfolderBase]: For 332070/332070 co-relation queries the response was YES. [2024-06-03 19:44:14,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77732 conditions, 13284 events. 9061/13284 cut-off events. For 332070/332070 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79073 event pairs, 3396 based on Foata normal form. 4/13224 useless extension candidates. Maximal degree in co-relation 77677. Up to 12290 conditions per place. [2024-06-03 19:44:14,070 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 161 selfloop transitions, 35 changer transitions 0/205 dead transitions. [2024-06-03 19:44:14,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 205 transitions, 2185 flow [2024-06-03 19:44:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-03 19:44:14,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-03 19:44:14,072 INFO L175 Difference]: Start difference. First operand has 135 places, 180 transitions, 1731 flow. Second operand 7 states and 185 transitions. [2024-06-03 19:44:14,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 205 transitions, 2185 flow [2024-06-03 19:44:14,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 205 transitions, 2077 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:14,362 INFO L231 Difference]: Finished difference. Result has 139 places, 180 transitions, 1702 flow [2024-06-03 19:44:14,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1702, PETRI_PLACES=139, PETRI_TRANSITIONS=180} [2024-06-03 19:44:14,363 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-03 19:44:14,363 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 180 transitions, 1702 flow [2024-06-03 19:44:14,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:14,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:14,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:14,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:44:14,364 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:14,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1908447447, now seen corresponding path program 1 times [2024-06-03 19:44:14,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:14,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455424395] [2024-06-03 19:44:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:15,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455424395] [2024-06-03 19:44:15,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455424395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:15,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535029040] [2024-06-03 19:44:15,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:15,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:44:15,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 180 transitions, 1702 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:15,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:15,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:44:15,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:17,631 INFO L124 PetriNetUnfolderBase]: 9049/13270 cut-off events. [2024-06-03 19:44:17,631 INFO L125 PetriNetUnfolderBase]: For 350199/350199 co-relation queries the response was YES. [2024-06-03 19:44:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77841 conditions, 13270 events. 9049/13270 cut-off events. For 350199/350199 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79052 event pairs, 3412 based on Foata normal form. 4/13211 useless extension candidates. Maximal degree in co-relation 77784. Up to 12391 conditions per place. [2024-06-03 19:44:17,744 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 184 selfloop transitions, 17 changer transitions 0/210 dead transitions. [2024-06-03 19:44:17,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 210 transitions, 2258 flow [2024-06-03 19:44:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:44:17,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-03 19:44:17,746 INFO L175 Difference]: Start difference. First operand has 139 places, 180 transitions, 1702 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:44:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 210 transitions, 2258 flow [2024-06-03 19:44:18,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 2141 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:18,035 INFO L231 Difference]: Finished difference. Result has 140 places, 187 transitions, 1736 flow [2024-06-03 19:44:18,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=140, PETRI_TRANSITIONS=187} [2024-06-03 19:44:18,035 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 83 predicate places. [2024-06-03 19:44:18,035 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 187 transitions, 1736 flow [2024-06-03 19:44:18,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:18,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:18,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:18,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:44:18,036 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:18,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1088122475, now seen corresponding path program 1 times [2024-06-03 19:44:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:18,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243561700] [2024-06-03 19:44:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:18,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:18,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:18,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243561700] [2024-06-03 19:44:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243561700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:18,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:18,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:44:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977116582] [2024-06-03 19:44:18,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:44:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:44:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:44:18,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:44:18,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 187 transitions, 1736 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:18,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:18,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:44:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:20,599 INFO L124 PetriNetUnfolderBase]: 8663/12987 cut-off events. [2024-06-03 19:44:20,600 INFO L125 PetriNetUnfolderBase]: For 376537/376685 co-relation queries the response was YES. [2024-06-03 19:44:20,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78664 conditions, 12987 events. 8663/12987 cut-off events. For 376537/376685 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 80539 event pairs, 3226 based on Foata normal form. 1/12793 useless extension candidates. Maximal degree in co-relation 78606. Up to 11797 conditions per place. [2024-06-03 19:44:20,722 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 171 selfloop transitions, 10 changer transitions 0/202 dead transitions. [2024-06-03 19:44:20,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 202 transitions, 2180 flow [2024-06-03 19:44:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:44:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:44:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 19:44:20,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-03 19:44:20,723 INFO L175 Difference]: Start difference. First operand has 140 places, 187 transitions, 1736 flow. Second operand 5 states and 132 transitions. [2024-06-03 19:44:20,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 202 transitions, 2180 flow [2024-06-03 19:44:21,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 202 transitions, 2098 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:21,008 INFO L231 Difference]: Finished difference. Result has 141 places, 191 transitions, 1743 flow [2024-06-03 19:44:21,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1743, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2024-06-03 19:44:21,009 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-03 19:44:21,009 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 1743 flow [2024-06-03 19:44:21,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:21,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:21,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:44:21,010 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:21,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1443616596, now seen corresponding path program 1 times [2024-06-03 19:44:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121892191] [2024-06-03 19:44:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:21,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:21,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121892191] [2024-06-03 19:44:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121892191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:21,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:21,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:21,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719289795] [2024-06-03 19:44:21,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:21,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:21,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:21,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 1743 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:21,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:21,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:21,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:24,083 INFO L124 PetriNetUnfolderBase]: 10351/14858 cut-off events. [2024-06-03 19:44:24,083 INFO L125 PetriNetUnfolderBase]: For 476922/476927 co-relation queries the response was YES. [2024-06-03 19:44:24,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93790 conditions, 14858 events. 10351/14858 cut-off events. For 476922/476927 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 86176 event pairs, 3970 based on Foata normal form. 12/14862 useless extension candidates. Maximal degree in co-relation 93731. Up to 13523 conditions per place. [2024-06-03 19:44:24,210 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 160 selfloop transitions, 75 changer transitions 0/243 dead transitions. [2024-06-03 19:44:24,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 243 transitions, 2717 flow [2024-06-03 19:44:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-03 19:44:24,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-03 19:44:24,217 INFO L175 Difference]: Start difference. First operand has 141 places, 191 transitions, 1743 flow. Second operand 7 states and 197 transitions. [2024-06-03 19:44:24,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 243 transitions, 2717 flow [2024-06-03 19:44:24,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 243 transitions, 2656 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:24,552 INFO L231 Difference]: Finished difference. Result has 146 places, 204 transitions, 2048 flow [2024-06-03 19:44:24,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2048, PETRI_PLACES=146, PETRI_TRANSITIONS=204} [2024-06-03 19:44:24,561 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-03 19:44:24,561 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 204 transitions, 2048 flow [2024-06-03 19:44:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:24,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:24,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:24,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:44:24,561 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:24,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash -446658832, now seen corresponding path program 2 times [2024-06-03 19:44:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:24,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603194273] [2024-06-03 19:44:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:25,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:25,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603194273] [2024-06-03 19:44:25,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603194273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:25,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:25,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:25,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968347708] [2024-06-03 19:44:25,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:25,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:25,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:25,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:25,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 204 transitions, 2048 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:25,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:25,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:25,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:27,779 INFO L124 PetriNetUnfolderBase]: 10323/14817 cut-off events. [2024-06-03 19:44:27,779 INFO L125 PetriNetUnfolderBase]: For 500364/500369 co-relation queries the response was YES. [2024-06-03 19:44:27,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95207 conditions, 14817 events. 10323/14817 cut-off events. For 500364/500369 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85721 event pairs, 3914 based on Foata normal form. 12/14821 useless extension candidates. Maximal degree in co-relation 95146. Up to 13503 conditions per place. [2024-06-03 19:44:27,906 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 161 selfloop transitions, 71 changer transitions 0/240 dead transitions. [2024-06-03 19:44:27,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 240 transitions, 2836 flow [2024-06-03 19:44:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-03 19:44:27,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-03 19:44:27,928 INFO L175 Difference]: Start difference. First operand has 146 places, 204 transitions, 2048 flow. Second operand 7 states and 194 transitions. [2024-06-03 19:44:27,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 240 transitions, 2836 flow [2024-06-03 19:44:28,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 240 transitions, 2715 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:28,300 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 2081 flow [2024-06-03 19:44:28,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2081, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-03 19:44:28,301 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-03 19:44:28,301 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 2081 flow [2024-06-03 19:44:28,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:28,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:28,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:28,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:44:28,302 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:28,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1518891092, now seen corresponding path program 3 times [2024-06-03 19:44:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:28,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388681112] [2024-06-03 19:44:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:28,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388681112] [2024-06-03 19:44:29,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388681112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:29,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:29,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635713884] [2024-06-03 19:44:29,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:29,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 2081 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:29,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:29,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:31,553 INFO L124 PetriNetUnfolderBase]: 10299/14763 cut-off events. [2024-06-03 19:44:31,553 INFO L125 PetriNetUnfolderBase]: For 526688/526690 co-relation queries the response was YES. [2024-06-03 19:44:31,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95760 conditions, 14763 events. 10299/14763 cut-off events. For 526688/526690 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85276 event pairs, 3964 based on Foata normal form. 4/14751 useless extension candidates. Maximal degree in co-relation 95698. Up to 13483 conditions per place. [2024-06-03 19:44:31,700 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 154 selfloop transitions, 78 changer transitions 0/240 dead transitions. [2024-06-03 19:44:31,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 240 transitions, 2877 flow [2024-06-03 19:44:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-03 19:44:31,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-03 19:44:31,702 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 2081 flow. Second operand 7 states and 194 transitions. [2024-06-03 19:44:31,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 240 transitions, 2877 flow [2024-06-03 19:44:32,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 240 transitions, 2720 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:32,172 INFO L231 Difference]: Finished difference. Result has 153 places, 204 transitions, 2089 flow [2024-06-03 19:44:32,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2089, PETRI_PLACES=153, PETRI_TRANSITIONS=204} [2024-06-03 19:44:32,172 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-03 19:44:32,173 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 204 transitions, 2089 flow [2024-06-03 19:44:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:32,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:32,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:44:32,173 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:32,174 INFO L85 PathProgramCache]: Analyzing trace with hash -236078932, now seen corresponding path program 4 times [2024-06-03 19:44:32,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:32,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23099018] [2024-06-03 19:44:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:32,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:33,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:33,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23099018] [2024-06-03 19:44:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23099018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:33,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815785628] [2024-06-03 19:44:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:33,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:33,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:33,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 204 transitions, 2089 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:33,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:33,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:33,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:35,212 INFO L124 PetriNetUnfolderBase]: 10331/14820 cut-off events. [2024-06-03 19:44:35,213 INFO L125 PetriNetUnfolderBase]: For 555487/555495 co-relation queries the response was YES. [2024-06-03 19:44:35,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96987 conditions, 14820 events. 10331/14820 cut-off events. For 555487/555495 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85771 event pairs, 3976 based on Foata normal form. 8/14812 useless extension candidates. Maximal degree in co-relation 96924. Up to 13502 conditions per place. [2024-06-03 19:44:35,359 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 82 changer transitions 0/239 dead transitions. [2024-06-03 19:44:35,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 239 transitions, 2830 flow [2024-06-03 19:44:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-03 19:44:35,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-03 19:44:35,362 INFO L175 Difference]: Start difference. First operand has 153 places, 204 transitions, 2089 flow. Second operand 7 states and 190 transitions. [2024-06-03 19:44:35,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 239 transitions, 2830 flow [2024-06-03 19:44:35,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 239 transitions, 2489 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 19:44:35,775 INFO L231 Difference]: Finished difference. Result has 151 places, 208 transitions, 1994 flow [2024-06-03 19:44:35,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1994, PETRI_PLACES=151, PETRI_TRANSITIONS=208} [2024-06-03 19:44:35,776 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-03 19:44:35,776 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 208 transitions, 1994 flow [2024-06-03 19:44:35,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:35,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:35,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:35,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:44:35,776 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:35,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1704733390, now seen corresponding path program 5 times [2024-06-03 19:44:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505992661] [2024-06-03 19:44:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:36,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:36,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505992661] [2024-06-03 19:44:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505992661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:36,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:36,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298611978] [2024-06-03 19:44:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:36,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:36,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:36,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:36,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:36,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 208 transitions, 1994 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:36,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:36,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:36,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:38,925 INFO L124 PetriNetUnfolderBase]: 10317/14804 cut-off events. [2024-06-03 19:44:38,926 INFO L125 PetriNetUnfolderBase]: For 578211/578227 co-relation queries the response was YES. [2024-06-03 19:44:39,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97196 conditions, 14804 events. 10317/14804 cut-off events. For 578211/578227 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85650 event pairs, 3942 based on Foata normal form. 14/14808 useless extension candidates. Maximal degree in co-relation 97133. Up to 13494 conditions per place. [2024-06-03 19:44:39,087 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 150 selfloop transitions, 77 changer transitions 0/235 dead transitions. [2024-06-03 19:44:39,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 235 transitions, 2646 flow [2024-06-03 19:44:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-03 19:44:39,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-03 19:44:39,088 INFO L175 Difference]: Start difference. First operand has 151 places, 208 transitions, 1994 flow. Second operand 7 states and 185 transitions. [2024-06-03 19:44:39,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 235 transitions, 2646 flow [2024-06-03 19:44:39,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 235 transitions, 2478 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:39,562 INFO L231 Difference]: Finished difference. Result has 154 places, 208 transitions, 1989 flow [2024-06-03 19:44:39,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1989, PETRI_PLACES=154, PETRI_TRANSITIONS=208} [2024-06-03 19:44:39,562 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 97 predicate places. [2024-06-03 19:44:39,563 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 208 transitions, 1989 flow [2024-06-03 19:44:39,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:39,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:39,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:44:39,563 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:39,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1212718538, now seen corresponding path program 6 times [2024-06-03 19:44:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884425498] [2024-06-03 19:44:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884425498] [2024-06-03 19:44:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884425498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:40,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:40,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:44:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315748290] [2024-06-03 19:44:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:40,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:44:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:40,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:44:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:44:40,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:40,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 208 transitions, 1989 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:40,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:40,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:40,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:42,561 INFO L124 PetriNetUnfolderBase]: 10279/14750 cut-off events. [2024-06-03 19:44:42,561 INFO L125 PetriNetUnfolderBase]: For 605527/605543 co-relation queries the response was YES. [2024-06-03 19:44:42,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97495 conditions, 14750 events. 10279/14750 cut-off events. For 605527/605543 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85264 event pairs, 3940 based on Foata normal form. 18/14758 useless extension candidates. Maximal degree in co-relation 97431. Up to 13462 conditions per place. [2024-06-03 19:44:42,699 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 152 selfloop transitions, 73 changer transitions 0/233 dead transitions. [2024-06-03 19:44:42,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 233 transitions, 2507 flow [2024-06-03 19:44:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:44:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:44:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 19:44:42,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-03 19:44:42,706 INFO L175 Difference]: Start difference. First operand has 154 places, 208 transitions, 1989 flow. Second operand 7 states and 184 transitions. [2024-06-03 19:44:42,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 233 transitions, 2507 flow [2024-06-03 19:44:43,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 233 transitions, 2316 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:43,240 INFO L231 Difference]: Finished difference. Result has 156 places, 208 transitions, 1955 flow [2024-06-03 19:44:43,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1955, PETRI_PLACES=156, PETRI_TRANSITIONS=208} [2024-06-03 19:44:43,241 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 99 predicate places. [2024-06-03 19:44:43,241 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 208 transitions, 1955 flow [2024-06-03 19:44:43,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:43,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:43,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:44:43,242 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:43,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash -627940267, now seen corresponding path program 1 times [2024-06-03 19:44:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:43,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024039958] [2024-06-03 19:44:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:44,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024039958] [2024-06-03 19:44:44,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024039958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:44,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:44,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:44:44,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695160869] [2024-06-03 19:44:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:44,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:44:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:44:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:44:44,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:44:44,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 208 transitions, 1955 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:44,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:44,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:44:44,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:46,061 INFO L124 PetriNetUnfolderBase]: 9777/14287 cut-off events. [2024-06-03 19:44:46,061 INFO L125 PetriNetUnfolderBase]: For 618809/618949 co-relation queries the response was YES. [2024-06-03 19:44:46,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95939 conditions, 14287 events. 9777/14287 cut-off events. For 618809/618949 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 85469 event pairs, 3677 based on Foata normal form. 1/14168 useless extension candidates. Maximal degree in co-relation 95874. Up to 13255 conditions per place. [2024-06-03 19:44:46,199 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 186 selfloop transitions, 14 changer transitions 0/224 dead transitions. [2024-06-03 19:44:46,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 224 transitions, 2445 flow [2024-06-03 19:44:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:44:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:44:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 19:44:46,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-03 19:44:46,200 INFO L175 Difference]: Start difference. First operand has 156 places, 208 transitions, 1955 flow. Second operand 6 states and 148 transitions. [2024-06-03 19:44:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 224 transitions, 2445 flow [2024-06-03 19:44:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 224 transitions, 2264 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:46,609 INFO L231 Difference]: Finished difference. Result has 155 places, 212 transitions, 1877 flow [2024-06-03 19:44:46,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1877, PETRI_PLACES=155, PETRI_TRANSITIONS=212} [2024-06-03 19:44:46,610 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 98 predicate places. [2024-06-03 19:44:46,610 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 212 transitions, 1877 flow [2024-06-03 19:44:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:46,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:46,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:46,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:44:46,610 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:46,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1912615434, now seen corresponding path program 1 times [2024-06-03 19:44:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958115661] [2024-06-03 19:44:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:47,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:47,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958115661] [2024-06-03 19:44:47,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958115661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:47,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:47,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:47,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213293907] [2024-06-03 19:44:47,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:47,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:47,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:47,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:47,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:47,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 212 transitions, 1877 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:47,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:47,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:47,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:49,980 INFO L124 PetriNetUnfolderBase]: 11105/15867 cut-off events. [2024-06-03 19:44:49,980 INFO L125 PetriNetUnfolderBase]: For 800297/800302 co-relation queries the response was YES. [2024-06-03 19:44:50,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112812 conditions, 15867 events. 11105/15867 cut-off events. For 800297/800302 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 92082 event pairs, 3363 based on Foata normal form. 36/15895 useless extension candidates. Maximal degree in co-relation 112746. Up to 13832 conditions per place. [2024-06-03 19:44:50,166 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 176 selfloop transitions, 90 changer transitions 0/275 dead transitions. [2024-06-03 19:44:50,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 275 transitions, 2859 flow [2024-06-03 19:44:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-03 19:44:50,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-03 19:44:50,168 INFO L175 Difference]: Start difference. First operand has 155 places, 212 transitions, 1877 flow. Second operand 8 states and 229 transitions. [2024-06-03 19:44:50,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 275 transitions, 2859 flow [2024-06-03 19:44:50,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 275 transitions, 2784 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:50,684 INFO L231 Difference]: Finished difference. Result has 160 places, 220 transitions, 2155 flow [2024-06-03 19:44:50,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2155, PETRI_PLACES=160, PETRI_TRANSITIONS=220} [2024-06-03 19:44:50,685 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 103 predicate places. [2024-06-03 19:44:50,685 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 220 transitions, 2155 flow [2024-06-03 19:44:50,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:50,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:50,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:50,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:44:50,686 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:50,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1920650634, now seen corresponding path program 2 times [2024-06-03 19:44:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:50,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230336825] [2024-06-03 19:44:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:51,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:51,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230336825] [2024-06-03 19:44:51,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230336825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:51,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:51,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412103480] [2024-06-03 19:44:51,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:51,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:51,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 220 transitions, 2155 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:51,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:51,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:51,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:54,258 INFO L124 PetriNetUnfolderBase]: 11355/16213 cut-off events. [2024-06-03 19:44:54,258 INFO L125 PetriNetUnfolderBase]: For 863883/863888 co-relation queries the response was YES. [2024-06-03 19:44:54,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119123 conditions, 16213 events. 11355/16213 cut-off events. For 863883/863888 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 94365 event pairs, 4053 based on Foata normal form. 44/16249 useless extension candidates. Maximal degree in co-relation 119055. Up to 14590 conditions per place. [2024-06-03 19:44:54,430 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 176 selfloop transitions, 85 changer transitions 0/270 dead transitions. [2024-06-03 19:44:54,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 270 transitions, 2890 flow [2024-06-03 19:44:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-03 19:44:54,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-03 19:44:54,431 INFO L175 Difference]: Start difference. First operand has 160 places, 220 transitions, 2155 flow. Second operand 8 states and 222 transitions. [2024-06-03 19:44:54,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 270 transitions, 2890 flow [2024-06-03 19:44:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 270 transitions, 2745 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:55,037 INFO L231 Difference]: Finished difference. Result has 164 places, 223 transitions, 2266 flow [2024-06-03 19:44:55,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2266, PETRI_PLACES=164, PETRI_TRANSITIONS=223} [2024-06-03 19:44:55,037 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 107 predicate places. [2024-06-03 19:44:55,037 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 223 transitions, 2266 flow [2024-06-03 19:44:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:55,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:55,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:44:55,038 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:44:55,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1802559792, now seen corresponding path program 1 times [2024-06-03 19:44:55,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867110087] [2024-06-03 19:44:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:56,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867110087] [2024-06-03 19:44:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867110087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:56,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022005954] [2024-06-03 19:44:56,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:56,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:56,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:56,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:44:56,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 223 transitions, 2266 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:56,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:56,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:44:56,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:59,208 INFO L124 PetriNetUnfolderBase]: 11447/16334 cut-off events. [2024-06-03 19:44:59,208 INFO L125 PetriNetUnfolderBase]: For 885924/885924 co-relation queries the response was YES. [2024-06-03 19:44:59,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121244 conditions, 16334 events. 11447/16334 cut-off events. For 885924/885924 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 95041 event pairs, 4225 based on Foata normal form. 8/16333 useless extension candidates. Maximal degree in co-relation 121174. Up to 15263 conditions per place. [2024-06-03 19:44:59,391 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 208 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-03 19:44:59,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 267 transitions, 2964 flow [2024-06-03 19:44:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 19:44:59,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-03 19:44:59,392 INFO L175 Difference]: Start difference. First operand has 164 places, 223 transitions, 2266 flow. Second operand 8 states and 215 transitions. [2024-06-03 19:44:59,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 267 transitions, 2964 flow [2024-06-03 19:45:00,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 267 transitions, 2769 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:00,021 INFO L231 Difference]: Finished difference. Result has 166 places, 228 transitions, 2271 flow [2024-06-03 19:45:00,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2271, PETRI_PLACES=166, PETRI_TRANSITIONS=228} [2024-06-03 19:45:00,022 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 109 predicate places. [2024-06-03 19:45:00,022 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 228 transitions, 2271 flow [2024-06-03 19:45:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:00,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:00,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:45:00,023 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:00,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1168325188, now seen corresponding path program 2 times [2024-06-03 19:45:00,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:00,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931111567] [2024-06-03 19:45:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:00,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931111567] [2024-06-03 19:45:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931111567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:01,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76070150] [2024-06-03 19:45:01,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:01,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:45:01,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 228 transitions, 2271 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:01,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:01,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:45:01,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:03,867 INFO L124 PetriNetUnfolderBase]: 11631/16608 cut-off events. [2024-06-03 19:45:03,868 INFO L125 PetriNetUnfolderBase]: For 937820/937820 co-relation queries the response was YES. [2024-06-03 19:45:03,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126112 conditions, 16608 events. 11631/16608 cut-off events. For 937820/937820 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 96896 event pairs, 4049 based on Foata normal form. 8/16597 useless extension candidates. Maximal degree in co-relation 126041. Up to 14649 conditions per place. [2024-06-03 19:45:04,071 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 165 selfloop transitions, 113 changer transitions 0/287 dead transitions. [2024-06-03 19:45:04,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 287 transitions, 3511 flow [2024-06-03 19:45:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-03 19:45:04,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-03 19:45:04,088 INFO L175 Difference]: Start difference. First operand has 166 places, 228 transitions, 2271 flow. Second operand 8 states and 225 transitions. [2024-06-03 19:45:04,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 287 transitions, 3511 flow [2024-06-03 19:45:05,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 287 transitions, 3311 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:05,217 INFO L231 Difference]: Finished difference. Result has 168 places, 242 transitions, 2598 flow [2024-06-03 19:45:05,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2598, PETRI_PLACES=168, PETRI_TRANSITIONS=242} [2024-06-03 19:45:05,218 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 111 predicate places. [2024-06-03 19:45:05,218 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 242 transitions, 2598 flow [2024-06-03 19:45:05,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:05,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:05,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:05,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:45:05,219 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:05,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1625308302, now seen corresponding path program 3 times [2024-06-03 19:45:05,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:05,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517236679] [2024-06-03 19:45:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:05,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517236679] [2024-06-03 19:45:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517236679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497596426] [2024-06-03 19:45:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:06,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:06,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:45:06,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 242 transitions, 2598 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:06,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:06,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:45:06,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:09,182 INFO L124 PetriNetUnfolderBase]: 11787/16842 cut-off events. [2024-06-03 19:45:09,182 INFO L125 PetriNetUnfolderBase]: For 1012275/1012275 co-relation queries the response was YES. [2024-06-03 19:45:09,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133001 conditions, 16842 events. 11787/16842 cut-off events. For 1012275/1012275 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 98492 event pairs, 4072 based on Foata normal form. 8/16831 useless extension candidates. Maximal degree in co-relation 132928. Up to 14765 conditions per place. [2024-06-03 19:45:09,394 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 167 selfloop transitions, 118 changer transitions 0/294 dead transitions. [2024-06-03 19:45:09,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 294 transitions, 3813 flow [2024-06-03 19:45:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-03 19:45:09,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-03 19:45:09,396 INFO L175 Difference]: Start difference. First operand has 168 places, 242 transitions, 2598 flow. Second operand 8 states and 221 transitions. [2024-06-03 19:45:09,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 294 transitions, 3813 flow [2024-06-03 19:45:10,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 294 transitions, 3636 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-03 19:45:10,130 INFO L231 Difference]: Finished difference. Result has 173 places, 251 transitions, 2852 flow [2024-06-03 19:45:10,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2852, PETRI_PLACES=173, PETRI_TRANSITIONS=251} [2024-06-03 19:45:10,131 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 116 predicate places. [2024-06-03 19:45:10,131 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 251 transitions, 2852 flow [2024-06-03 19:45:10,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:10,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:10,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:10,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:45:10,131 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:10,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1625431434, now seen corresponding path program 3 times [2024-06-03 19:45:10,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:10,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690256945] [2024-06-03 19:45:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:10,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:11,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:11,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690256945] [2024-06-03 19:45:11,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690256945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:11,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:11,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320834859] [2024-06-03 19:45:11,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:11,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:11,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:45:11,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 251 transitions, 2852 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:11,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:11,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:45:11,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:14,650 INFO L124 PetriNetUnfolderBase]: 12037/17199 cut-off events. [2024-06-03 19:45:14,651 INFO L125 PetriNetUnfolderBase]: For 1086313/1086318 co-relation queries the response was YES. [2024-06-03 19:45:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137038 conditions, 17199 events. 12037/17199 cut-off events. For 1086313/1086318 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 100838 event pairs, 4120 based on Foata normal form. 44/17227 useless extension candidates. Maximal degree in co-relation 136963. Up to 15504 conditions per place. [2024-06-03 19:45:14,841 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 208 selfloop transitions, 78 changer transitions 0/295 dead transitions. [2024-06-03 19:45:14,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 295 transitions, 3633 flow [2024-06-03 19:45:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-03 19:45:14,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:45:14,842 INFO L175 Difference]: Start difference. First operand has 173 places, 251 transitions, 2852 flow. Second operand 8 states and 216 transitions. [2024-06-03 19:45:14,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 295 transitions, 3633 flow [2024-06-03 19:45:16,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 295 transitions, 3428 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:16,377 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 2893 flow [2024-06-03 19:45:16,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2893, PETRI_PLACES=177, PETRI_TRANSITIONS=254} [2024-06-03 19:45:16,378 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 120 predicate places. [2024-06-03 19:45:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 2893 flow [2024-06-03 19:45:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:16,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:16,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:16,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:45:16,379 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1625062038, now seen corresponding path program 1 times [2024-06-03 19:45:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:16,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065224933] [2024-06-03 19:45:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:17,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:17,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065224933] [2024-06-03 19:45:17,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065224933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:17,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:17,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706373128] [2024-06-03 19:45:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:17,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:17,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:17,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:17,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:45:17,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 254 transitions, 2893 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:17,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:17,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:45:17,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:20,667 INFO L124 PetriNetUnfolderBase]: 12064/17212 cut-off events. [2024-06-03 19:45:20,667 INFO L125 PetriNetUnfolderBase]: For 1108191/1108191 co-relation queries the response was YES. [2024-06-03 19:45:20,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138370 conditions, 17212 events. 12064/17212 cut-off events. For 1108191/1108191 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 100763 event pairs, 4210 based on Foata normal form. 4/17203 useless extension candidates. Maximal degree in co-relation 138294. Up to 16278 conditions per place. [2024-06-03 19:45:20,868 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 255 selfloop transitions, 31 changer transitions 0/295 dead transitions. [2024-06-03 19:45:20,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 295 transitions, 3679 flow [2024-06-03 19:45:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 19:45:20,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 19:45:20,870 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 2893 flow. Second operand 8 states and 204 transitions. [2024-06-03 19:45:20,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 295 transitions, 3679 flow [2024-06-03 19:45:21,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 295 transitions, 3488 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:21,914 INFO L231 Difference]: Finished difference. Result has 180 places, 261 transitions, 2911 flow [2024-06-03 19:45:21,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2911, PETRI_PLACES=180, PETRI_TRANSITIONS=261} [2024-06-03 19:45:21,914 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 123 predicate places. [2024-06-03 19:45:21,915 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 261 transitions, 2911 flow [2024-06-03 19:45:21,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:21,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:21,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:21,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:45:21,915 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:21,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash 578540880, now seen corresponding path program 1 times [2024-06-03 19:45:21,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:21,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027647960] [2024-06-03 19:45:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:22,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027647960] [2024-06-03 19:45:22,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027647960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:22,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:22,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:45:22,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091230351] [2024-06-03 19:45:22,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:22,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:45:22,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:45:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:45:22,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:45:22,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 261 transitions, 2911 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:22,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:22,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:45:22,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:25,622 INFO L124 PetriNetUnfolderBase]: 11471/16582 cut-off events. [2024-06-03 19:45:25,623 INFO L125 PetriNetUnfolderBase]: For 1137966/1138158 co-relation queries the response was YES. [2024-06-03 19:45:25,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137122 conditions, 16582 events. 11471/16582 cut-off events. For 1137966/1138158 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 100134 event pairs, 4045 based on Foata normal form. 1/16380 useless extension candidates. Maximal degree in co-relation 137044. Up to 15350 conditions per place. [2024-06-03 19:45:25,836 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 243 selfloop transitions, 14 changer transitions 0/286 dead transitions. [2024-06-03 19:45:25,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 286 transitions, 3557 flow [2024-06-03 19:45:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:45:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:45:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 19:45:25,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-03 19:45:25,849 INFO L175 Difference]: Start difference. First operand has 180 places, 261 transitions, 2911 flow. Second operand 6 states and 157 transitions. [2024-06-03 19:45:25,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 286 transitions, 3557 flow [2024-06-03 19:45:26,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 286 transitions, 3419 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:26,701 INFO L231 Difference]: Finished difference. Result has 181 places, 265 transitions, 2894 flow [2024-06-03 19:45:26,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2894, PETRI_PLACES=181, PETRI_TRANSITIONS=265} [2024-06-03 19:45:26,702 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 124 predicate places. [2024-06-03 19:45:26,702 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 265 transitions, 2894 flow [2024-06-03 19:45:26,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:26,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:26,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:45:26,702 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash 917106384, now seen corresponding path program 4 times [2024-06-03 19:45:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:26,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129432865] [2024-06-03 19:45:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:26,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:27,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129432865] [2024-06-03 19:45:27,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129432865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:27,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:27,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:27,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501839322] [2024-06-03 19:45:27,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:27,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:27,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:27,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:27,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:28,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:45:28,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 265 transitions, 2894 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:28,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:28,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:45:28,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:31,262 INFO L124 PetriNetUnfolderBase]: 12192/17374 cut-off events. [2024-06-03 19:45:31,262 INFO L125 PetriNetUnfolderBase]: For 1202293/1202295 co-relation queries the response was YES. [2024-06-03 19:45:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144051 conditions, 17374 events. 12192/17374 cut-off events. For 1202293/1202295 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 101529 event pairs, 4335 based on Foata normal form. 4/17360 useless extension candidates. Maximal degree in co-relation 143972. Up to 16252 conditions per place. [2024-06-03 19:45:31,473 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 244 selfloop transitions, 52 changer transitions 0/305 dead transitions. [2024-06-03 19:45:31,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 305 transitions, 3665 flow [2024-06-03 19:45:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 19:45:31,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-03 19:45:31,475 INFO L175 Difference]: Start difference. First operand has 181 places, 265 transitions, 2894 flow. Second operand 8 states and 212 transitions. [2024-06-03 19:45:31,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 305 transitions, 3665 flow [2024-06-03 19:45:32,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 305 transitions, 3572 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:32,253 INFO L231 Difference]: Finished difference. Result has 185 places, 269 transitions, 3005 flow [2024-06-03 19:45:32,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3005, PETRI_PLACES=185, PETRI_TRANSITIONS=269} [2024-06-03 19:45:32,255 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 128 predicate places. [2024-06-03 19:45:32,255 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 269 transitions, 3005 flow [2024-06-03 19:45:32,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:32,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:32,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:32,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:45:32,256 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:45:32,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash 917226354, now seen corresponding path program 5 times [2024-06-03 19:45:32,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:32,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420857530] [2024-06-03 19:45:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420857530] [2024-06-03 19:45:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420857530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:33,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:33,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:33,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208629521] [2024-06-03 19:45:33,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:33,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:33,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:33,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:33,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:45:33,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 269 transitions, 3005 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:33,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:33,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:45:33,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand